# Fulfillment Lexicon: full text > Plain-English definitions of the fulfillment, parcel, freight, inventory, customs, and returns terms used by US ecommerce brands, with formulas and calculators. Last reviewed 2026-10-16. ## 3PL Onboarding URL: https://fulfillment.wiki/glossary/3pl-onboarding/ Category: Fulfillment & Warehousing 3PL Onboarding is the process of moving a brand's fulfillment to a new 3PL, including contract setup, system integration, SKU data, packaging specs, inbound inventory transfer, and test orders before go-live. Why it matters: Rushed onboarding is a common cause of stockouts, late orders, and billing disputes in the first months. Planning the cutover around peak season and sending complete SKU data reduces risk. Q: How long does it take to switch 3PLs? A: Many brands plan for several weeks to a few months, depending on SKU count, integrations, and how much inventory must move. Avoid switching during or just before peak season. ## ABC Analysis URL: https://fulfillment.wiki/glossary/abc-analysis/ Category: Inventory Planning ABC Analysis is sorting SKUs into classes by their share of sales: A items are the few that drive most revenue, C items are the many that drive little. Why it matters: Used to set different safety stock, cycle count frequency, and slotting rules for each class. Q: What are typical ABC analysis cutoffs? A: A common split puts the SKUs driving about 80% of sales or value in class A, the next 15% in B, and the last 5% in C. The exact cutoffs are a choice, so pick ones that create useful groups for your catalog. ## Accessorial Charge URL: https://fulfillment.wiki/glossary/accessorial-charge/ Category: Freight & Retail Compliance Accessorial Charge is a freight fee for services beyond standard dock-to-dock transport, such as liftgate, inside delivery, residential delivery, appointment, or detention. Why it matters: Unplanned accessorials are a common reason freight invoices exceed quotes. Q: What are the most common LTL accessorial charges? A: Common ones include liftgate, residential delivery, limited-access location, inside delivery, appointment or notify, and reclassification or reweigh fees. Declare known services when booking so they are quoted rather than added after delivery. ## Additional Handling Surcharge URL: https://fulfillment.wiki/glossary/additional-handling-surcharge/ Category: Parcel Shipping Additional Handling Surcharge is a per-package fee that UPS and FedEx charge for packages needing manual handling because of length, weight, or packaging, such as heavy cartons or items not fully encased in corrugated board. Why it matters: It is commonly triggered by a longest side over 48 inches, a second-longest side over 30 inches, weight over 50 pounds, or non-corrugated packaging. Small changes in carton size or packaging can remove it entirely. Q: How do I avoid the additional handling surcharge? A: Keep packages below the carrier's length, side, and weight thresholds and ship in fully enclosed corrugated cartons rather than bags, tubes, or wrapped items. Check the current carrier service guide, since thresholds and criteria can change. ## Address Validation URL: https://fulfillment.wiki/glossary/address-validation/ Category: Parcel Shipping Address Validation is the process of checking and standardizing a shipping address against postal and carrier data before a label is printed, flagging addresses that are incomplete, misspelled, or undeliverable. Why it matters: Bad addresses cause returns to sender, reshipments, and carrier address correction fees billed after the fact. Validating at checkout is cheaper than fixing the address after the package is in transit. Q: What is a carrier address correction fee? A: It is a charge UPS and FedEx apply when they have to fix an incorrect or incomplete address to deliver a package. It is billed per package after shipment, so validating addresses before label creation avoids it. ## Advance Shipping Notice (ASN) URL: https://fulfillment.wiki/glossary/advance-shipping-notice/ Category: Systems & Automation Advance Shipping Notice (ASN) is an electronic notice sent before a shipment arrives, listing its contents, packaging, and expected arrival. In retail EDI this is the 856 document. Why it matters: 3PLs need ASNs to receive inbound stock quickly; retailers require them to accept deliveries. Q: What happens if I don't send an ASN? A: A 3PL may receive the shipment more slowly or charge extra for unplanned receiving. A retailer may issue a compliance chargeback. ## Allocated Inventory URL: https://fulfillment.wiki/glossary/allocated-inventory/ Category: Inventory Planning Allocated Inventory is units that are still physically in the warehouse but have been reserved for specific open orders, so they can no longer be sold to new customers. Why it matters: Allocated units count as on-hand but not as available. Long gaps between allocation and shipment hide inventory that looks sellable in reports but is not. Q: Is allocated inventory the same as committed inventory? A: Yes, most systems use allocated, committed, and reserved interchangeably for units tied to open orders that have not yet shipped. Some platforms reserve at order placement and allocate to a specific warehouse later, so check your system's definitions. ## Antidumping Duty (AD) URL: https://fulfillment.wiki/glossary/antidumping-duty/ Category: Import & Customs Antidumping Duty (AD) is an additional US duty on imports found to be sold below fair value, set by product, country, and often manufacturer, and collected alongside any countervailing duty on subsidized goods. Why it matters: AD/CVD rates can be very high and may be adjusted years after entry, so importers can face large back bills. Check whether your product and supplier fall under an AD/CVD order before sourcing. Q: How do I know if antidumping duties apply to my product? A: Search the US Department of Commerce and CBP AD/CVD case listings by product and country, and ask your customs broker to review the scope language. Scope is defined by product description, not only HTS code. ## Application Programming Interface (API) URL: https://fulfillment.wiki/glossary/application-programming-interface/ Category: Systems & Automation Application Programming Interface (API) is a defined way for one software system to request data or actions from another, such as a storefront sending orders to a 3PL's system or pulling inventory levels back. Why it matters: Most modern integrations between stores, marketplaces, OMS, WMS, and carriers run over APIs. Their reliability, rate limits, and error handling determine whether orders and inventory stay in sync. Q: What is the difference between an API and EDI? A: EDI exchanges standardized business documents, often in batches, and is common with large retailers. APIs let systems request or send data on demand, usually in near real time, and are common in ecommerce platforms and 3PL software. ## Appointment Delivery URL: https://fulfillment.wiki/glossary/appointment-delivery/ Category: Freight & Retail Compliance Appointment Delivery is an accessorial service in which the carrier schedules a specific date or time window with the receiver before delivering, often billed as a notify, call-ahead, or appointment fee. Why it matters: Retail DCs, Amazon fulfillment centers, and most 3PLs require a delivery appointment, so inbound freight without one can be refused or delayed. Missing the appointment can also trigger redelivery fees and retailer compliance fines. Q: What happens if an LTL carrier misses a delivery appointment? A: The receiver may refuse the load and the carrier must reschedule, which usually adds days and can add redelivery or storage charges. For retail orders, a missed appointment can also mean a late delivery against the purchase order and a compliance chargeback. ## Automated Bagging URL: https://fulfillment.wiki/glossary/automated-bagging/ Category: Systems & Automation Automated Bagging is packing orders with a machine that opens a poly or paper bag, accepts the items, seals it, and often prints and applies the shipping label in one step. Why it matters: Auto-baggers can greatly increase packing speed for apparel and other soft goods. Bags fitted to the order also reduce void fill and can lower dimensional weight charges compared with boxes. Q: What products work with automated bagging machines? A: Mostly non-fragile items that do not need box protection, such as apparel, textiles, and soft accessories. Fragile or rigid products are usually packed in boxes or with an automated box-making machine instead. ## Automated Commercial Environment (ACE) URL: https://fulfillment.wiki/glossary/automated-commercial-environment/ Category: Import & Customs Automated Commercial Environment (ACE) is the electronic system US Customs and Border Protection uses to process imports and exports, receiving entry filings, ISF data, partner agency information, and duty payments. Why it matters: Your customs broker files through ACE, but importers can open their own ACE portal account to see entries, duties paid, and reports. That visibility helps reconcile broker invoices and landed cost. Q: Can an importer access ACE without a customs broker? A: Yes. Importers can request an ACE portal account to view their own entry data, payments, and reports. Filing entries electronically, however, is usually done by a licensed customs broker or a self-filer with the required certification. ## Automated Storage and Retrieval System (AS/RS) URL: https://fulfillment.wiki/glossary/automated-storage-and-retrieval-system/ Category: Systems & Automation Automated Storage and Retrieval System (AS/RS) is computer-controlled equipment that stores totes, bins, or pallets in dense racking and automatically retrieves them on demand. Why it matters: AS/RS increases storage density and pick rates in the same footprint, which matters in high-rent US markets near population centers where same-day and next-day promises require local inventory. Q: Is an AS/RS worth it for a growing ecommerce brand? A: It can be when a site has high, steady volume, expensive space, or labor shortages. For smaller or fast-changing operations, using a 3PL that already has automation is often lower risk than buying a system. ## Automation Payback Period URL: https://fulfillment.wiki/glossary/automation-payback-period/ Category: Systems & Automation Automation Payback Period is the time it takes for the savings from a warehouse automation project, mainly reduced labor and errors, to equal its total upfront investment. Why it matters: Payback period is the simplest way to compare automation options and is often required for capital approval. Use realistic volume forecasts, since savings shrink if order volume falls. Formula: Payback period (years) = Total upfront investment / Annual net savings. Example: Total upfront investment $600,000, Annual net savings $250,000: Payback period = 2.4 years. Q: What is a good payback period for warehouse automation? A: There is no single standard, but many companies look for payback within a few years, since equipment and business needs change. Compare the payback period with the contract length or how long you expect to use the site. ## Autonomous Mobile Robot (AMR) URL: https://fulfillment.wiki/glossary/autonomous-mobile-robot/ Category: Systems & Automation Autonomous Mobile Robot (AMR) is a robot that navigates a warehouse using sensors and maps, without fixed tracks, to move totes, carts, or shelves. Why it matters: AMRs can be added in phases, so they are a common first automation step for 3PLs and mid-sized brands. Q: What is the difference between an AMR and an AGV? A: An AGV (automated guided vehicle) follows fixed paths such as wires, tape, or markers. An AMR navigates on its own using sensors and maps, so it can route around obstacles and adapt to layout changes. ## Available to Promise (ATP) URL: https://fulfillment.wiki/glossary/available-to-promise/ Category: Inventory Planning Available to Promise (ATP) is the quantity of a SKU that can still be committed to new customer orders by a given date, calculated from on-hand stock and scheduled receipts minus existing commitments. Why it matters: ATP is what your storefront and marketplaces should show as sellable. Publishing on-hand instead of ATP leads to overselling and cancellations. Formula: ATP = on-hand + scheduled receipts in the window − allocated to open orders − units on hold. Example: On hand 500 units, Scheduled receipts in the window 300 units, Allocated to open orders 120 units, On hold 30 units: Available to promise = 650 units. Q: What is the difference between on-hand and available-to-promise inventory? A: On-hand is everything physically in the warehouse. Available to promise subtracts units already allocated to open orders or on hold and can add confirmed incoming receipts, so it reflects what you can actually sell. ## Average Order Value (AOV) URL: https://fulfillment.wiki/glossary/average-order-value/ Category: Metrics & Unit Economics Average Order Value (AOV) is the average amount of revenue per customer order over a period, calculated by dividing total order revenue by the number of orders. Why it matters: Many fulfillment and shipping costs are charged per order, so higher AOV spreads them over more revenue and lowers logistics cost as a percent of sales. Free shipping thresholds are a common lever. Formula: AOV = total order revenue ÷ number of orders. Example: Total order revenue $360,000, Number of orders 4,800 orders: AOV = $75.00. Q: How does average order value affect fulfillment costs? A: Per-order costs such as the base pick fee, box, and much of postage stay similar as AOV rises, so fulfillment and shipping as a percent of revenue fall. For example, a $10 per-order logistics cost is 20% of a $50 order but 10% of a $100 order. ## B2B Fulfillment URL: https://fulfillment.wiki/glossary/b2b-fulfillment/ Category: Fulfillment & Warehousing B2B Fulfillment is fulfilling orders for business customers such as retailers, wholesalers, or distributors, typically shipped in cases or pallets with retailer-specific labels, documents, and delivery appointments. Why it matters: Wholesale orders follow strict retailer routing guides, and mistakes trigger chargebacks. A 3PL that handles DTC parcels well may not be set up for EDI, carton labels, or LTL appointments. Q: How is B2B fulfillment different from B2C fulfillment? A: B2C fulfillment ships small parcel orders of a few units to consumers, while B2B fulfillment ships larger case or pallet orders to businesses under retailer compliance rules. B2B usually requires EDI, ASNs, carton labeling, and freight shipping. ## Backorder URL: https://fulfillment.wiki/glossary/backorder/ Category: Inventory Planning Backorder is an order accepted for an item that is out of stock, to be shipped when new inventory arrives. Why it matters: Backorders keep revenue during stockouts but need clear delivery dates to avoid cancellations and chargebacks. Q: Should I allow backorders on my online store? A: Allowing backorders captures sales during a stockout but only works if you have confirmed incoming inventory and show a clear expected ship date. Without reliable restock dates, backorders lead to cancellations and support tickets. ## Backorder Rate URL: https://fulfillment.wiki/glossary/backorder-rate/ Category: Metrics & Unit Economics Backorder Rate is the percentage of orders, or order lines, that contain at least one item that could not ship immediately because it was out of stock and was placed on backorder. Why it matters: High backorder rates mean delayed revenue, split shipments, and cancellations. Tracking by SKU separates planned preorders from forecasting misses. Formula: Backorder rate = orders with at least one backordered line ÷ total orders × 100. Example: Orders with a backordered line 240 orders, Total orders 8,000 orders: Backorder rate = 3.0%. Q: Is a high backorder rate bad for an ecommerce brand? A: Usually yes, unless backorders are deliberate preorders. Unplanned backorders delay revenue, increase cancellations and support tickets, and often add the cost of a second shipment. ## Batch Picking URL: https://fulfillment.wiki/glossary/batch-picking/ Category: Fulfillment & Warehousing Batch Picking is a picking method where one picker collects items for several orders in a single trip, then items are sorted into individual orders. Why it matters: Cuts walking time sharply for small, single-line orders, which describes most DTC traffic. Q: When should a warehouse use batch picking? A: Batch picking works well when many orders contain the same or nearby SKUs and are small, which is common in DTC. It reduces walking but requires a sorting step after picking. ## Bill of Lading (BOL) URL: https://fulfillment.wiki/glossary/bill-of-lading/ Category: Freight & Retail Compliance Bill of Lading (BOL) is the legal document between a shipper and carrier listing what is shipped, its origin and destination, and terms of carriage. It also serves as a receipt. Why it matters: Errors in weight, class, or piece count on the BOL lead to reclassification fees and disputed claims. Q: Who fills out the bill of lading for an LTL shipment? A: The shipper usually prepares the bill of lading, often generated by a TMS, carrier portal, or broker, and the driver signs it at pickup. It must show accurate piece count, weight, class or NMFC item, freight terms, and any special services. ## Bill of Materials (BOM) URL: https://fulfillment.wiki/glossary/bill-of-materials/ Category: Inventory Planning Bill of Materials (BOM) is a list of the component SKUs and quantities that make up a finished product or kit. Why it matters: Your OMS or WMS needs a correct BOM so that selling one bundle deducts the right component inventory. Q: What is the difference between a bill of materials and a kit? A: The bill of materials is the recipe that lists the component SKUs and quantities that make up a product. A kit is the physical or virtual finished product built from that recipe. ## Billable Weight URL: https://fulfillment.wiki/glossary/billable-weight/ Category: Parcel Shipping Billable Weight is the weight a carrier charges for: the greater of actual weight and dimensional weight, rounded up to the next pound. Why it matters: Audit invoices for billable weight adjustments; carriers re-measure packages and bill the difference. Q: What is the difference between actual weight and billable weight? A: Actual weight is what the package weighs on a scale. Billable weight is what the carrier charges for, which is the greater of the actual weight and the dimensional weight, rounded up to the next pound. ## Bonded Warehouse URL: https://fulfillment.wiki/glossary/bonded-warehouse/ Category: Import & Customs Bonded Warehouse is a CBP-authorized facility where imported goods can be stored without paying duty for up to five years from import, with duty due only when goods are withdrawn for US consumption. Why it matters: Bonded storage defers duty and lets brands avoid paying duty on goods later re-exported. It costs more than standard storage and limits what you can do to the goods, so it suits high-duty, slow-moving inventory. Q: What is the difference between a bonded warehouse and a foreign-trade zone? A: Both defer duty, but a bonded warehouse is mainly for storage with limited handling and a five-year limit. A foreign-trade zone allows more activity, such as assembly and repacking, has no time limit, and can offer other duty benefits. ## Box-Free Returns URL: https://fulfillment.wiki/glossary/box-free-returns/ Category: Returns Box-Free Returns is a return method in which the customer brings an unpackaged item and a QR code to a drop-off location, where staff pack, label, and ship it back on the brand's behalf. Why it matters: Removing the need for a box and printer makes returns easier for customers. Drop-off networks often consolidate items into bulk shipments, which can lower per-return shipping cost. Q: How do QR code returns work? A: The customer starts a return online and receives a QR code instead of a printable label. A drop-off location scans the code, and either prints the label or packs the item, depending on the program. ## Buy Online, Pick Up In Store (BOPIS) URL: https://fulfillment.wiki/glossary/buy-online-pick-up-in-store/ Category: Fulfillment & Warehousing Buy Online, Pick Up In Store (BOPIS) is an order placed online and collected by the customer at a store, usually the same day. Why it matters: Removes last-mile cost and often generates extra in-store purchases. Q: How does BOPIS benefit retailers? A: It avoids shipping costs, gives customers fast access to items, and brings shoppers into stores where they may buy more. It depends on accurate store inventory. ## Cargo Ready Date (CRD) URL: https://fulfillment.wiki/glossary/cargo-ready-date/ Category: Import & Customs Cargo Ready Date (CRD) is the date a supplier confirms goods will be produced, packed, and available for pickup or delivery to the origin port or warehouse. Why it matters: Forwarders book vessel space and plan ISF around the cargo ready date. A slipping CRD can cause missed sailings and rolled bookings, so track it weekly on every purchase order. Q: What is the difference between cargo ready date and ship date? A: The cargo ready date is when goods are available at origin. The ship date, or estimated time of departure, is when the vessel or flight actually leaves, which can be days or weeks later depending on bookings and transit to the port. ## Carmack Amendment URL: https://fulfillment.wiki/glossary/carmack-amendment/ Category: Freight & Retail Compliance Carmack Amendment is the US federal law governing liability of interstate motor carriers and freight forwarders for loss or damage to goods, making the carrier liable for actual loss unless liability is lawfully limited. Why it matters: Carmack sets the framework for nearly every domestic truck freight claim, including filing time limits. Carriers often limit liability through released rates in their tariffs, so the recoverable amount may be far below the goods' value. Q: Does the Carmack Amendment mean the carrier pays the full value of damaged goods? A: Not always. Carmack makes the carrier liable for actual loss, but carriers can limit liability with a released value, such as a dollar amount per pound, in their tariff or bill of lading. Declaring a higher value or buying cargo insurance covers the gap. ## Carrier Claim URL: https://fulfillment.wiki/glossary/carrier-claim/ Category: Parcel Shipping Carrier Claim is a formal request to a carrier for reimbursement of a package that was lost, damaged, or delivered with missing contents, supported by proof of value and shipment details. Why it matters: Claims recover money only if they are filed within the carrier's deadline with invoices, photos, and packaging kept. Many brands reship to the customer first and file the claim afterward. Q: How do I file a claim for a lost package? A: Wait until the carrier's minimum waiting period has passed, then file through the carrier's claims portal or your shipping platform with the tracking number, proof of value such as an invoice, and photos if damaged. Each carrier sets its own filing deadline. ## Carrier Invoice Audit URL: https://fulfillment.wiki/glossary/carrier-audit/ Category: Systems & Automation Carrier Invoice Audit is reviewing carrier invoices for errors such as duplicate charges, wrong surcharges, incorrect weights, and late deliveries eligible for refunds. Why it matters: Shippers often recover a meaningful share of spend from billing errors and service failures. Q: How much can carrier invoice audits save? A: Results vary, but audits often recover money from late deliveries covered by guarantees, incorrect surcharges, and wrong dimensional adjustments. Check whether your carrier contract waives service guarantees before expecting refunds for lateness. ## Carrier Pickup URL: https://fulfillment.wiki/glossary/carrier-pickup/ Category: Parcel Shipping Carrier Pickup is a scheduled or on-demand collection of outbound packages by a carrier from a warehouse, store, or office, instead of the shipper dropping them off at a carrier location. Why it matters: The daily pickup time sets your real cutoff time for same-day shipping. A missed or late pickup delays every order in that day's batch, even if packing finished on time. Q: Does USPS pick up packages for free? A: USPS offers free Package Pickup at a home or business address for eligible services such as Priority Mail and Ground Advantage when scheduled in advance. UPS and FedEx pickup terms depend on the account and may carry a fee. ## Carrying Cost URL: https://fulfillment.wiki/glossary/carrying-cost/ Category: Metrics & Unit Economics Carrying Cost is the total cost of holding inventory over time, including capital, storage, insurance, shrinkage, and obsolescence. Why it matters: Often estimated at 20 to 30% of inventory value per year. It is the hidden cost of over-ordering. Formula: Annual carrying cost = average inventory value × carrying cost rate. Example: Average inventory value $250,000, Carrying cost rate per year 25%: Annual carrying cost = $62,500.00. Q: What is included in inventory carrying cost? A: Carrying cost includes the cost of capital tied up in inventory, warehouse storage fees, insurance, taxes, shrinkage, damage, and obsolescence. Storage fees are the most visible part, but capital cost is often the largest. ## Cartonization URL: https://fulfillment.wiki/glossary/cartonization/ Category: Systems & Automation Cartonization is software logic that picks the best box size for each order based on item dimensions, weight, and fragility. Why it matters: Choosing smaller boxes lowers DIM weight, packaging cost, and void fill. Q: How does cartonization reduce shipping costs? A: By choosing the smallest suitable box for each order, it reduces dimensional weight, packaging material, and void fill. It needs accurate item dimensions to work well. ## Case Picking URL: https://fulfillment.wiki/glossary/case-picking/ Category: Fulfillment & Warehousing Case Picking is picking full cases or cartons rather than individual units, common for wholesale, retail replenishment, and B2B orders. Why it matters: Brands selling both DTC and wholesale need a warehouse that handles each and case picking. Case orders often need carton labels and pallet building to meet retailer rules. Q: What is the difference between case picking and each picking? A: Case picking pulls whole sealed cartons, while each picking pulls individual units. Case picking is faster per unit and common for B2B orders, while each picking dominates DTC. ## Cash Conversion Cycle (CCC) URL: https://fulfillment.wiki/glossary/cash-conversion-cycle/ Category: Metrics & Unit Economics Cash Conversion Cycle (CCC) is the number of days between paying suppliers for inventory and collecting cash from customers for the sale of that inventory. Why it matters: Brands that pay deposits months before goods arrive can have long cycles that strain cash during growth. DTC brands usually collect from payment processors within days, so inventory days and supplier terms drive most of the cycle. Formula: CCC = days inventory outstanding + days sales outstanding − days payables outstanding. Example: Days inventory outstanding 90 days, Days sales outstanding 5 days, Days payables outstanding 30 days: Cash conversion cycle = 65 days. Q: How can a DTC brand shorten its cash conversion cycle? A: Hold fewer days of inventory, negotiate longer payment terms or smaller deposits with suppliers, and avoid slow-paying wholesale terms. Each day removed reduces the cash needed to fund growth. ## Certificate of Origin URL: https://fulfillment.wiki/glossary/certificate-of-origin/ Category: Import & Customs Certificate of Origin is a document or statement certifying the country where goods were produced, used to claim preferential duty rates under trade agreements or to meet an importing country's requirements. Why it matters: For US imports, a certificate or certification of origin is how you support preference claims, such as under USMCA. Under USMCA, it can be a certification with required data elements rather than a fixed form, and it must be available if CBP asks. Q: Do I need a certificate of origin to import into the US? A: Not for every shipment. The US generally requires origin to be declared and marked, but a certificate or certification of origin is typically needed only when you claim a preferential rate under a trade agreement such as USMCA. ## Chargeback (Retail Compliance) URL: https://fulfillment.wiki/glossary/chargeback/ Category: Freight & Retail Compliance Chargeback (Retail Compliance) is a deduction a retailer takes from a supplier's invoice for violating its routing guide or vendor requirements, such as late delivery, wrong labels, or missing ASNs. Why it matters: Compliance fines can be a few percent of an order's value. Track them by reason to fix the process causing them. Q: How do I dispute a retail compliance chargeback? A: Review the deduction details in the retailer's vendor portal, gather evidence such as proof of delivery, ASN transmission logs, and label photos, and submit a dispute within the retailer's deadline. Track root causes so the same violation does not repeat. ## Click-to-Door Time URL: https://fulfillment.wiki/glossary/click-to-door-time/ Category: Metrics & Unit Economics Click-to-Door Time is the total elapsed time from when a customer places an order online to when the package is delivered, combining warehouse processing time and carrier transit time. Why it matters: Customers experience the whole interval, not your warehouse SLA. Breaking it into time to ship and transit time shows whether to fix fulfillment speed or inventory placement. Formula: Click-to-door time = delivery timestamp − order timestamp. Example: Order placed 2026-10-12 09:00, Delivered 2026-10-15 15:00: Click-to-door time = 78 hours; In days = 3.25 days. Q: How can I reduce click-to-door time? A: Shorten processing by moving cutoff times later and shipping same day, then shorten transit by placing inventory closer to customers or using faster carrier services in the zones that matter most. ## Cluster Picking URL: https://fulfillment.wiki/glossary/cluster-picking/ Category: Fulfillment & Warehousing Cluster Picking is a picking method where one picker fills several orders at once by placing items directly into separate order totes or cart slots, so no later sorting step is needed. Why it matters: Cluster picking cuts walking time for small, multi-order DTC workloads while avoiding the sort step of classic batch picking. It works best with a cart and a scanner that shows which tote gets each item. Formula: Picking trips = orders to pick ÷ totes on the cart, rounded up. A cart with 8 totes lets a picker fill 8 orders in one trip instead of 8 separate trips. Example: Orders to pick 40 orders, Totes on the cart 8 totes: Picking trips with cluster picking = 5 trips; Trips saved compared with one order per trip = 35 trips. Q: What is the difference between cluster picking and batch picking? A: Both pick several orders in one trip. In cluster picking items go straight into each order's own tote, while in classic batch picking items for all orders are picked together and sorted afterward. ## Cold Chain Shipping URL: https://fulfillment.wiki/glossary/cold-chain-shipping/ Category: Parcel Shipping Cold Chain Shipping is the shipping of perishable or temperature-sensitive goods, such as food, meal kits, and some pharmaceuticals, in insulated packaging with refrigerants so products stay within a safe temperature range. Why it matters: Cold chain parcels are packed for the expected transit time and weather, so many brands ship only early in the week to avoid weekend holds. Packaging and expedited service often cost more than the product margin allows if not planned carefully. Q: Can you ship dry ice through UPS or FedEx? A: Yes, but dry ice is regulated as a hazardous material, so the package needs the correct marking, a declared dry ice weight, and packaging that lets gas vent. Air shipments have tighter limits and require carrier approval or training. ## Collaborative Robot (Cobot) URL: https://fulfillment.wiki/glossary/collaborative-robot/ Category: Systems & Automation Collaborative Robot (Cobot) is a robot designed to work safely alongside people without full safety caging, such as a mobile cart that follows or meets pickers, or a robotic arm at a workstation. Why it matters: Cobots let warehouses add automation without redesigning the whole building, so they often suit 3PLs and mid-size brands. Gains depend on how much walking or repetitive handling they remove. Q: What is the difference between a cobot and an AMR? A: A cobot is any robot built to work safely near people, while an AMR is a robot that navigates on its own. Many warehouse cobots are AMRs that work alongside pickers, but a robotic arm can also be a cobot. ## Collect Freight URL: https://fulfillment.wiki/glossary/collect-freight/ Category: Freight & Retail Compliance Collect Freight is a payment term in which the consignee pays the carrier's freight charges, as opposed to prepaid freight, where the shipper pays, or third-party billing, where another party pays. Why it matters: Many retailers require suppliers to ship collect using carriers from their routing guide, so the brand controls loading and paperwork but not the carrier choice. The freight terms box on the bill of lading must match the agreement or the bill goes to the wrong party. Q: What is the difference between prepaid and collect freight? A: With prepaid freight, the shipper pays the carrier and may add the cost to the customer's invoice. With collect freight, the receiver pays the carrier directly. A third-party bill-to sends charges to someone else, such as a brand paying for a supplier's shipment. ## Commercial Invoice URL: https://fulfillment.wiki/glossary/commercial-invoice/ Category: Import & Customs Commercial Invoice is the seller's invoice for an international shipment that lists the parties, goods description, quantity, value, currency, country of origin, and sale terms, used by customs to assess duties. Why it matters: US Customs bases duty on the value and descriptions on the commercial invoice, so errors can mean wrong duties, penalties, or holds. Ask suppliers for an invoice that lists HTS codes, origin, and Incoterms for every line. Q: What must a commercial invoice include for US Customs? A: It should identify the seller and buyer, describe the goods in enough detail to classify them, and show quantities, unit and total values, currency, country of origin, and the terms of sale. Your customs broker may ask for more, such as HTS codes and manufacturer identification. ## Consignment Inventory URL: https://fulfillment.wiki/glossary/consignment-inventory/ Category: Inventory Planning Consignment Inventory is stock held at a retailer's or brand's location while the supplier keeps legal ownership, with the holder paying only for units after they sell. Why it matters: Consignment shifts cash and obsolescence risk to the supplier. It is common when selling through boutiques or when a brand stocks a partner's products. Q: Does consignment inventory go on the retailer's balance sheet? A: Generally no. Because the supplier keeps ownership until the goods sell, consignment stock stays on the supplier's books, and the retailer records the cost only when a unit is sold. ## Consolidator URL: https://fulfillment.wiki/glossary/consolidator/ Category: Parcel Shipping Consolidator is a company that combines parcels from many shippers to sort and inject them into USPS or other networks at lower rates. Why it matters: Can cut cost on light packages but usually adds transit time. Q: What does a parcel consolidator do? A: A consolidator collects packages from many shippers, sorts them by destination, and injects them into USPS or other carriers closer to the recipients. Shippers get lower rates in exchange for an extra handoff that can add transit time. ## Contract Rate URL: https://fulfillment.wiki/glossary/contract-rate/ Category: Freight & Retail Compliance Contract Rate is a negotiated freight price agreed between a shipper and a carrier or broker for specific lanes or volumes over a set term, commonly six to twelve months. Why it matters: Contract rates give predictable costs, but carriers can reject tenders when the spot market rises above the contracted price. Track tender acceptance rates alongside the price itself. Q: Why does a carrier reject loads even though we have a contract rate? A: Most truckload contracts commit price, not capacity, so carriers can decline tenders when spot rates are higher or their trucks are needed elsewhere. Rejected loads then go to backup carriers or the spot market, usually at a higher cost. ## Contribution Margin URL: https://fulfillment.wiki/glossary/contribution-margin/ Category: Metrics & Unit Economics Contribution Margin is revenue minus all variable costs of a sale, such as product cost, shipping, fulfillment, payment processing, and often marketing, showing what each order contributes toward fixed costs and profit. Why it matters: Gross margin can look healthy while shipping, fulfillment, and fees make each order unprofitable. Contribution margin per order is the clearest test of whether growth adds profit. Formula: Contribution margin = revenue − variable costs. Per order, variable costs usually include COGS, shipping, fulfillment, payment fees, and marketing. Example: Revenue per order $80, COGS $28, Shipping $9, Fulfillment $5, Payment fees $2.50, Marketing $15: Contribution margin = $20.50; As a share of revenue = 25.6%. Q: What is the difference between gross margin and contribution margin? A: Gross margin subtracts only cost of goods sold from revenue. Contribution margin also subtracts other variable costs like shipping, fulfillment, payment fees, and often ad spend, so it is lower and closer to true per-order profit. ## Conveyor System URL: https://fulfillment.wiki/glossary/conveyor-system/ Category: Systems & Automation Conveyor System is powered or gravity-driven belts and rollers that move totes, cartons, or parcels between areas of a warehouse, such as from picking to packing to shipping. Why it matters: Conveyors cut walking and carrying time in large facilities and connect other automation like sorters and print-and-apply labelers. Fixed layouts make them less flexible than mobile robots when volume or layout changes. Q: Are conveyors or mobile robots better for a warehouse? A: Conveyors handle high, steady volumes along fixed paths efficiently, while mobile robots are easier to scale and rearrange. Many sites combine both, using conveyors for main flows and robots for flexible movement. ## Cost of Goods Sold (COGS) URL: https://fulfillment.wiki/glossary/cost-of-goods-sold/ Category: Metrics & Unit Economics Cost of Goods Sold (COGS) is the direct cost of the inventory a business sold during a period, typically including product cost, inbound freight, duties, and other landed costs, but not outbound shipping or marketing. Why it matters: COGS is the base of gross margin, inventory turnover, and GMROI. Ecommerce brands often under-report it by leaving freight and duties out of product cost. Formula: COGS = beginning inventory + purchases (at landed cost) − ending inventory. Example: Beginning inventory $120,000, Purchases at landed cost $300,000, Ending inventory $140,000: COGS = $280,000. Q: Is shipping included in cost of goods sold? A: Inbound freight to get inventory to your warehouse is usually capitalized into inventory and flows into COGS. Outbound shipping to customers is often reported separately as a fulfillment or selling expense, though policies vary, so apply one rule consistently. ## Cost per Order (CPO) URL: https://fulfillment.wiki/glossary/cost-per-order/ Category: Metrics & Unit Economics Cost per Order (CPO) is the total cost to fulfill and ship one customer order. Why it matters: The core unit-economics metric for logistics. Track with and without postage to see where savings come from. Formula: Cost per order = (fulfillment labor or 3PL fees + packaging + postage + storage allocation) ÷ orders shipped. Example: Fulfillment labor or 3PL fees $30,000, Packaging $5,000, Postage $60,000, Storage allocation $5,000, Orders shipped 10,000 orders: Cost per order = $10.00. Q: What is included in fulfillment cost per order? A: Typically pick and pack fees or labor, packaging materials, outbound postage, and a share of storage and receiving costs. Some brands also include returns processing; state which costs you include so comparisons are fair. ## Cost per Return URL: https://fulfillment.wiki/glossary/cost-per-return/ Category: Returns Cost per Return is the total cost of handling one return, including return shipping, receiving and inspection labor, repackaging, refund processing, and lost value from items that cannot be resold at full price. Why it matters: Return cost is often higher than brands expect because value loss and labor are spread across budgets. Knowing it per SKU shows which products, policies, or customers make returns unprofitable. Formula: Cost per return = (return shipping + handling labor + repackaging + refund processing + value loss) / returns processed. Example: Return shipping $4,000, Handling labor $2,000, Repackaging $500, Refund processing $0, Value loss $3,500, Returns processed 500 returns: Cost per return = $20.00. Q: How do you calculate the cost of a return? A: Add return shipping, labor to receive, inspect, and restock, packaging, payment processing costs on the refund, and the drop in resale value. Divide the total for a period by the number of returns processed. ## Cost per Unit Shipped URL: https://fulfillment.wiki/glossary/cost-per-unit-shipped/ Category: Metrics & Unit Economics Cost per Unit Shipped is the total fulfillment and shipping cost for a period divided by the number of units shipped in that period. Why it matters: It normalizes logistics cost for brands whose order sizes vary. Comparing cost per unit and cost per order shows whether savings come from efficiency or from larger baskets. Formula: Cost per unit shipped = (fulfillment fees + packaging + postage) ÷ units shipped. Example: Fulfillment fees $42,000, Packaging $6,000, Postage $96,000, Units shipped 30,000 units: Cost per unit shipped = $4.80. Q: Should I track cost per order or cost per unit shipped? A: Track both. Cost per order matches how most 3PLs and carriers bill, while cost per unit makes it easier to compare periods or channels with different units per order. ## Cost to Serve URL: https://fulfillment.wiki/glossary/cost-to-serve/ Category: Metrics & Unit Economics Cost to Serve is the total cost of fulfilling and supporting a specific customer, channel, or order type, including fulfillment, shipping, returns, customer service, and channel fees. Why it matters: Average cost per order hides that wholesale, marketplace, subscription, and DTC orders cost very different amounts to serve. Cost to serve shows which channels and customers are actually profitable. Formula: Cost to serve per order (channel) = (fulfillment + shipping + returns processing + customer service + channel fees) ÷ orders in that channel. Example: Fulfillment $15,000, Shipping $30,000, Returns processing $4,000, Customer service $3,000, Channel fees $8,000, Orders in the channel 5,000 orders: Cost to serve per order = $12.00. Q: Why is cost to serve different from cost per order? A: Cost per order is usually a single average of fulfillment and shipping. Cost to serve assigns all handling, returns, support, and channel costs to a specific segment, so it reveals differences between, for example, Amazon, wholesale, and DTC customers. ## Cost, Insurance and Freight (CIF) URL: https://fulfillment.wiki/glossary/cost-insurance-and-freight/ Category: Import & Customs Cost, Insurance and Freight (CIF) is an Incoterms rule for sea and inland waterway transport in which the seller pays freight and minimum insurance to the destination port, while risk passes to the buyer once goods are loaded at origin. Why it matters: Under CIF the seller picks the carrier and insurance, so the buyer has less control and visibility. US customs value generally excludes international freight and insurance, so the broker deducts them from a CIF price. Q: Is the US customs value based on CIF or FOB? A: The US generally appraises imports on transaction value excluding international freight and insurance, which is close to an FOB basis. If the invoice is CIF, those charges are deducted when they are shown separately. ## Country of Origin URL: https://fulfillment.wiki/glossary/country-of-origin/ Category: Import & Customs Country of Origin is the country where goods were wholly produced or, for goods with inputs from several countries, last substantially transformed into a new article with a new name, character, or use. Why it matters: Origin, not the ship-from country, determines which duties and trade remedies apply. Moving final assembly or shipping through a third country does not change origin unless a substantial transformation happens there. Q: Does shipping goods through another country change their country of origin? A: No. Simple transshipment, relabeling, or minor processing does not change origin. Origin changes only if the goods undergo substantial transformation in that country, and CBP can penalize misdeclared origin. ## Cross-Docking URL: https://fulfillment.wiki/glossary/cross-docking/ Category: Fulfillment & Warehousing Cross-Docking is unloading inbound freight and loading it directly onto outbound trucks with little or no storage time in between. Why it matters: Reduces handling and storage costs. Brands use it to split an import container across several warehouses quickly. Q: What are the benefits of cross-docking? A: Cross-docking reduces storage time and handling by moving goods straight from inbound to outbound trucks. It works best when inbound shipments are predictable and already labeled for their destination. ## Cubic Pricing URL: https://fulfillment.wiki/glossary/cubic-pricing/ Category: Parcel Shipping Cubic Pricing is a USPS pricing method for Priority Mail and Ground Advantage packages up to 0.5 cubic feet and 20 pounds that charges by package volume tier and zone instead of weight. Why it matters: Small, dense items such as supplements, cosmetics, and parts often cost less under cubic pricing than weight-based rates. It is usually available through commercial shipping platforms. Formula: Cubic feet = (L x W x H) / 1,728. The result is rounded up to the next 0.1 cubic foot pricing tier. Example: Length 10 in, Width 8 in, Height 4 in: Cubic feet = 0.185 cubic feet; Pricing tier = 0.2 cubic feet. Q: How is USPS cubic tier calculated? A: Multiply length, width, and height in inches after rounding each down to the nearest quarter inch, then divide by 1,728 to get cubic feet. The result is rounded up to the next tier in 0.1 cubic foot steps. ## Custom Packaging URL: https://fulfillment.wiki/glossary/custom-packaging/ Category: Fulfillment & Warehousing Custom Packaging is shipping boxes, mailers, inserts, or tissue designed and printed for a specific brand, used to protect products and create a deliberate unboxing experience for the customer. Why it matters: Custom packaging can lift perceived value and repeat purchases, but it usually adds unit cost, minimum order quantities, and storage space at the 3PL. Box sizes should still be chosen with dimensional weight in mind. Q: Will my 3PL charge extra for custom packaging? A: Often yes. Many 3PLs charge for storing brand-supplied packaging and may add a per-order fee for extra steps such as inserts, tissue, or stickers, so confirm these fees before onboarding. ## Customs Bond URL: https://fulfillment.wiki/glossary/customs-bond/ Category: Import & Customs Customs Bond is a surety bond posted with US Customs and Border Protection that guarantees an importer will pay duties, taxes, and fees and comply with import rules, issued as a single-transaction or continuous bond. Why it matters: A bond is required for most formal entries and for filing ISF. A continuous bond covers all entries for a year and is set at the greater of $50,000 or 10% of the duties, taxes, and fees paid in the prior 12 months, so rising tariffs can force a larger bond. Q: Should I get a single-entry or continuous customs bond? A: A single-transaction bond covers one entry and suits importers with only a few shipments a year. If you import regularly, a continuous bond is usually cheaper overall and simplifies ISF and entry filings. ## Customs Broker URL: https://fulfillment.wiki/glossary/customs-broker/ Category: Import & Customs Customs Broker is a licensed professional who files entries with US Customs and Border Protection and calculates duties on behalf of importers. Why it matters: Correct classification and valuation by your broker directly affects duty cost and audit risk. Q: Do I need a customs broker to import into the US? A: You are not legally required to use one, but most importers do because filing formal entries electronically requires the right systems and expertise. A licensed broker files the entry on your behalf, while you remain liable as importer of record. ## Customs Exam URL: https://fulfillment.wiki/glossary/customs-exam/ Category: Import & Customs Customs Exam is an inspection of an import shipment by US Customs and Border Protection or another agency, ranging from a non-intrusive X-ray scan to a full devanning at a centralized examination station. Why it matters: Exams can add days to weeks and hundreds or thousands of dollars in drayage, handling, and storage, all paid by the importer. Clean, consistent documents and accurate descriptions reduce, but do not eliminate, the chance of one. Q: Who pays for a US customs exam? A: The importer pays exam costs, including moving the container to the exam station, labor to unload and reload, and any storage, demurrage, or detention while it is held. CBP does not reimburse these costs even if nothing is wrong. ## Customs Trade Partnership Against Terrorism (CTPAT) URL: https://fulfillment.wiki/glossary/customs-trade-partnership-against-terrorism/ Category: Import & Customs Customs Trade Partnership Against Terrorism (CTPAT) is a voluntary US Customs and Border Protection program in which importers, carriers, and other supply chain parties adopt security standards in exchange for benefits such as fewer inspections. Why it matters: CTPAT certification can reduce customs exams and give priority processing. Some large importers and retailers require their partners to meet CTPAT security criteria. Q: Is CTPAT worth it for a mid-size ecommerce importer? A: It can be if you import regularly and exams are costly or frequent, since certified members generally face fewer inspections. The application requires documented security procedures and supplier vetting, so weigh the effort against your import volume. ## Cutoff Time URL: https://fulfillment.wiki/glossary/cutoff-time/ Category: Fulfillment & Warehousing Cutoff Time is the latest time an order can be placed and still ship the same business day. Why it matters: A later cutoff improves conversion and delivery speed promises, but the warehouse must be staffed to process late orders before carrier pickup. Q: What happens if an order comes in after the cutoff time? A: It usually ships the next business day. Displaying the cutoff time at checkout helps set accurate delivery expectations. ## Cycle Count URL: https://fulfillment.wiki/glossary/cycle-count/ Category: Inventory Planning Cycle Count is counting a small portion of inventory on a rotating schedule instead of shutting down for a full physical count. Why it matters: Keeps inventory records accurate year-round so the storefront does not oversell. A items are usually counted more often. Q: How often should you cycle count inventory? A: Count high-value or fast-moving A items most often, such as monthly, B items quarterly, and C items once or twice a year. Also count locations whenever a pick finds a shortage. ## Damage Rate URL: https://fulfillment.wiki/glossary/damage-rate/ Category: Metrics & Unit Economics Damage Rate is the percentage of orders or units that arrive damaged or are found damaged in the warehouse, usually measured from customer claims and return reason codes. Why it matters: Every damaged order costs a replacement, return shipping, and a support contact. Separating warehouse damage from in-transit damage shows whether to fix packaging, handling, or carrier choice. Formula: Damage rate = orders reported damaged ÷ orders delivered × 100. Example: Orders reported damaged 45 orders, Orders delivered 15,000 orders: Damage rate = 0.30%. Q: How do I lower the damage rate on shipped orders? A: Review damage claims by SKU and carrier, then test better packaging such as right-sized boxes, inserts, or poly mailers swapped for boxes on fragile items. Drop or vibration tests before rollout help confirm the change works. ## Dark Store URL: https://fulfillment.wiki/glossary/dark-store/ Category: Fulfillment & Warehousing Dark Store is a retail-style site closed to shoppers and used only to fulfill online orders. Why it matters: Common in grocery and quick commerce. For brands, the concept overlaps with micro-fulfillment. Q: What is the difference between a dark store and a micro-fulfillment center? A: A dark store is a retail-style space closed to shoppers and used for online orders, often picked manually. A micro-fulfillment center is a small dedicated fulfillment site that is often automated. ## Days of Inventory (DOI) URL: https://fulfillment.wiki/glossary/days-of-inventory/ Category: Metrics & Unit Economics Days of Inventory (DOI) is the number of days current inventory will last at the expected sales rate. Also called days of supply or days inventory outstanding. Why it matters: Amazon and many 3PLs price long-term storage by age, so tracking DOI per SKU avoids aged-inventory surcharges. Formula: DOI = units on hand ÷ average daily units sold. Finance version: (average inventory ÷ COGS) × 365. Example (units version): Units on hand 900 units, Average daily units sold 30 units/day: Days of inventory = 30.0 days. Example (finance version): Average inventory at cost $200,000, Cost of goods sold for the year $1,200,000: Days of inventory = 60.8 days. Q: How do you calculate days of inventory for one SKU? A: Divide units on hand by average daily units sold. A SKU with 900 units on hand selling 30 units a day has 30 days of inventory. ## De Minimis URL: https://fulfillment.wiki/glossary/de-minimis/ Category: Import & Customs De Minimis is a value threshold below which imported shipments could enter duty-free with simplified entry. US Section 321 set this at $800 per person per day. Why it matters: The US suspended de minimis for commercial shipments from all countries on August 29, 2025 (Executive Order 14324). CBP made the suspension part of its regulations in June 2026, and the One Big Beautiful Bill Act ends the exemption by statute on July 1, 2027. Low-value DTC imports now need formal or informal entry and pay duties, so cross-border models built on Section 321 need new duty planning. Q: Is the $800 de minimis exemption still available for US imports? A: No. The Section 321 de minimis exemption was suspended for all countries effective August 29, 2025, under Executive Order 14324, and CBP codified the suspension by rule in June 2026. The One Big Beautiful Bill Act terminates it in statute as of July 1, 2027, so low-value shipments now need a formal or informal entry and pay applicable duties. ## Dead Stock URL: https://fulfillment.wiki/glossary/dead-stock/ Category: Inventory Planning Dead Stock is inventory that has not sold for a long period and is unlikely to sell at full price. Why it matters: Dead stock keeps generating storage fees. Common exits are bundling, discounting, liquidation, or donation. Q: When does inventory become dead stock? A: There is no single rule, but many brands label a SKU dead stock when it has had no sales for a set period, such as 90 to 180 days, or when it can no longer be sold because it is expired, discontinued, or outdated. ## Delivered at Place (DAP) URL: https://fulfillment.wiki/glossary/delivered-at-place/ Category: Import & Customs Delivered at Place (DAP) is an Incoterm where the seller pays transport to the destination but the buyer pays import duties and taxes. In ecommerce often called DDU (delivered duties unpaid). Why it matters: Lower checkout price, but higher risk of refused deliveries when customers see import charges. Q: What is the difference between DAP and DDP? A: Under DAP, the seller delivers to the named destination, but the buyer pays import duties and taxes and handles clearance. Under DDP, the seller also clears the goods for import and pays duties and taxes. ## Delivered Duty Paid (DDP) URL: https://fulfillment.wiki/glossary/delivered-duty-paid/ Category: Import & Customs Delivered Duty Paid (DDP) is an Incoterm, also used in cross-border ecommerce, where the seller pays all transport, duties, and taxes so the buyer owes nothing on delivery. Why it matters: For international DTC orders, DDP avoids surprise fees at the door that cause refused packages. Q: What does DDP mean for a cross-border ecommerce order? A: DDP means the seller pays all duties, taxes, and fees so the customer pays nothing on delivery. The seller, or a service it uses, typically acts as importer of record and must collect enough at checkout to cover those costs. ## Delivery Area Surcharge (DAS) URL: https://fulfillment.wiki/glossary/delivery-area-surcharge/ Category: Parcel Shipping Delivery Area Surcharge (DAS) is a fee carriers add for deliveries to ZIP codes they classify as less accessible, such as rural or remote areas. Why it matters: Carriers publish and periodically update DAS ZIP lists. Shipping-cost models should check destination ZIPs. Q: How do I know if an address has a delivery area surcharge? A: UPS and FedEx publish lists of ZIP codes subject to delivery area surcharges, and shipping platforms show the charge when rating a label. The lists are updated periodically, so check them yearly. ## Delivery Exception URL: https://fulfillment.wiki/glossary/delivery-exception/ Category: Parcel Shipping Delivery Exception is a carrier tracking status indicating that an unexpected event, such as weather, a bad address, damage, or a missed recipient, has delayed or interrupted a package's delivery. Why it matters: Exceptions are early warnings of late or failed deliveries. Monitoring them daily lets support contact customers before they ask and fix address issues before the package is returned. Q: What does delivery exception mean on UPS or FedEx tracking? A: It means something unexpected interrupted delivery, such as an incorrect address, nobody available to sign, weather, or damage. Many exceptions resolve on their own, but address problems usually need the shipper or recipient to act. ## Delivery Promise URL: https://fulfillment.wiki/glossary/delivery-promise/ Category: Parcel Shipping Delivery Promise is the estimated delivery date shown to a shopper on the product page or at checkout. Why it matters: Accurate, fast promises raise conversion. Promising dates you miss drives support tickets and lowers repeat purchase. Q: How accurate should my delivery date promise be? A: Aim to hit the promised date on the large majority of orders, measured with your actual processing and carrier transit data. Showing a date range or adding a buffer is better than missing a single date. ## Demand Forecasting URL: https://fulfillment.wiki/glossary/demand-forecasting/ Category: Inventory Planning Demand Forecasting is the practice of estimating future unit sales by SKU, channel, and time period, using sales history, seasonality, promotions, and known events such as launches. Why it matters: Every purchase order, safety stock level, and 3PL capacity booking starts from the forecast. Forecast errors turn directly into stockouts or overstock. Q: How far ahead should an ecommerce brand forecast demand? A: At least as far as your longest replenishment lead time plus one order cycle, so you can place purchase orders in time. Brands importing from Asia often forecast 6 to 12 months out at a monthly level and refine the nearer weeks in more detail. ## Demurrage URL: https://fulfillment.wiki/glossary/demurrage/ Category: Import & Customs Demurrage is a fee charged when a container stays at the port or terminal longer than the allowed free time. Why it matters: Delays in customs clearance or pickup can add daily fees quickly. Clearing customs early helps avoid it. Q: What is the difference between demurrage and detention? A: Demurrage is charged when a full container stays at the port or terminal beyond free time. Detention is charged when the container or chassis is kept outside the terminal beyond free time, such as when the empty is returned late. ## Detention URL: https://fulfillment.wiki/glossary/detention/ Category: Import & Customs Detention is a fee charged when a container or trailer is kept outside the terminal, or a truck waits at a facility, beyond the allowed free time. Why it matters: Slow unloading at your warehouse can trigger detention on both containers and trucks. Q: How do I avoid container detention charges? A: Unload containers quickly and return empties promptly, confirming the return location with the carrier before pickup. Negotiating extra free time and coordinating dock appointments with your drayage carrier also helps. ## Dimensional Weight (DIM weight) URL: https://fulfillment.wiki/glossary/dimensional-weight/ Category: Parcel Shipping Dimensional Weight (DIM weight) is a billable weight that carriers calculate from package volume. The carrier charges whichever is greater, actual weight or dimensional weight. Why it matters: Light but bulky products are billed for space. Right-sizing cartons is often the fastest way to cut parcel spend. Formula: DIM weight (lb) = length × width × height (in) ÷ divisor. UPS and FedEx commonly use 139 for daily rates. Since July 12, 2026, USPS also uses 139 for packages over 1,728 cubic inches (1 cubic foot) and rounds each dimension up to the next inch. The carrier bills the greater of DIM weight and actual weight, rounded up to the next pound. Example: Length 18 in, Width 14 in, Height 10 in, DIM divisor 139, Actual weight 12 lb: DIM weight = 18.1 lb; Billable weight (the greater, rounded up) = 19 lb. Q: How do I calculate dimensional weight? A: Multiply length, width, and height in inches and divide by the carrier's DIM divisor, commonly 139. The carrier bills the greater of that number and the actual weight. ## Dimensioner URL: https://fulfillment.wiki/glossary/dimensioner/ Category: Systems & Automation Dimensioner is a device that measures the length, width, and height of an item or parcel automatically, often combined with a scale and barcode scanner as a DWS (dimension, weight, scan) system. Why it matters: Carriers bill on dimensional weight, so accurate package dimensions help brands audit invoices and choose better box sizes. Dimensioners also capture SKU dimensions for cartonization. Q: Why would a warehouse use a dimensioner? A: To capture accurate item and package dimensions quickly, which supports correct box selection, accurate shipping rates, and checking carrier dimensional weight adjustments. ## Discrete Picking URL: https://fulfillment.wiki/glossary/discrete-picking/ Category: Fulfillment & Warehousing Discrete Picking is a picking method where one picker picks one order completely, from start to finish, before starting the next order; also called single-order picking. Why it matters: It is simple and accurate, so it suits low volumes, large items, or urgent orders. At higher volumes the walking time per order makes it slower than batch or cluster picking. Q: When does discrete picking make sense? A: It makes sense for small warehouses, bulky or high-value items, and rush orders where accuracy and simplicity matter more than picks per hour. Most growing DTC operations move to batch or cluster picking as volume rises. ## Disposition URL: https://fulfillment.wiki/glossary/disposition/ Category: Returns Disposition is the decision on what happens to a returned item: restock as new, sell as open box, refurbish, liquidate, recycle, or destroy. Why it matters: Clear disposition rules let the warehouse grade returns quickly and consistently. Q: What are the main disposition options for returns? A: The main options are restock as new, sell as open box or refurbished, return to the vendor, liquidate, donate, recycle, or destroy. The best choice depends on condition and the value you can recover. ## Distributed Inventory URL: https://fulfillment.wiki/glossary/distributed-inventory/ Category: Fulfillment & Warehousing Distributed Inventory is splitting inventory across several fulfillment centers so orders ship from the location closest to the customer. Also called multi-node fulfillment. Why it matters: Lowers average shipping zone and makes two-day ground delivery possible for most of the US, at the cost of more safety stock and transfers. Q: How many warehouses does an ecommerce brand need? A: It depends on order volume and delivery promise. Many US brands reach most of the country within two to three days ground from one or two well-placed locations, while faster promises usually need more sites. ## Distribution Center (DC) URL: https://fulfillment.wiki/glossary/distribution-center/ Category: Fulfillment & Warehousing Distribution Center (DC) is a warehouse that receives bulk inventory and redistributes it in cases or pallets to stores, wholesale customers, or fulfillment centers. Why it matters: Brands selling into retail ship to retailer DCs, which enforce strict routing guides and appointment windows. Q: Is a distribution center the same as a fulfillment center? A: Not exactly. A distribution center typically ships cases and pallets to stores or businesses, while a fulfillment center ships individual orders to consumers, though many sites now do both. ## Dock-to-Stock Time URL: https://fulfillment.wiki/glossary/dock-to-stock-time/ Category: Metrics & Unit Economics Dock-to-Stock Time is the time between a shipment arriving at the warehouse dock and its inventory being available to sell. Why it matters: A key 3PL SLA. Long dock-to-stock time during peak or after a product launch means lost sales even when product is physically in the building. Formula: Dock-to-stock time = timestamp available to sell − timestamp of arrival at dock. Many 3PL contracts target 24 to 72 hours. Example: Arrived at the dock 2026-10-12 08:00, Available to sell 2026-10-13 14:00: Dock-to-stock time = 30.0 hours; In days = 1.25 days. Q: What is a typical dock-to-stock time for a 3PL? A: Many 3PL contracts target 24 to 72 hours from arrival to sellable inventory, with longer allowances during peak season. Check whether the clock starts at arrival or at appointment time and whether it counts business days. ## Drayage URL: https://fulfillment.wiki/glossary/drayage/ Category: Import & Customs Drayage is short-distance trucking of ocean containers between a port or rail ramp and a nearby warehouse. Why it matters: Port congestion and chassis shortages make drayage a frequent source of delays and extra fees. Q: What does drayage cost include? A: A drayage quote usually covers the truck move between the port or rail ramp and your warehouse, plus a fuel surcharge. Chassis rental, pre-pull, yard storage, waiting time, and overweight fees are often billed separately, so ask for all likely accessorials. ## Dropshipping URL: https://fulfillment.wiki/glossary/dropshipping/ Category: Fulfillment & Warehousing Dropshipping is a model where the seller does not hold inventory; a supplier ships orders directly to the customer. Why it matters: Low inventory risk but less control over delivery speed, packaging, and quality. Q: What are the risks of dropshipping? A: The seller has less control over inventory accuracy, shipping speed, packaging, and quality, but the customer still holds the seller responsible. Supplier performance must be monitored closely. ## Dry Van URL: https://fulfillment.wiki/glossary/dry-van/ Category: Freight & Retail Compliance Dry Van is an enclosed, non-temperature-controlled trailer, most commonly 53 feet long in the US, used for most palletized and floor-loaded general merchandise. Why it matters: Most ecommerce truckload freight moves in dry vans. A 53-foot van typically holds about 26 standard pallets single-stacked, and federal gross vehicle limits usually cap cargo weight at around 42,000 to 45,000 pounds. Q: How many pallets fit in a 53-foot dry van? A: About 26 standard 48 × 40 inch pallets fit single-stacked when loaded straight, and up to about 30 when loaded turned, depending on the pallets and loading pattern. Stackable freight can double that if weight limits allow. ## Duty Drawback URL: https://fulfillment.wiki/glossary/duty-drawback/ Category: Import & Customs Duty Drawback is a refund of up to 99% of duties, taxes, and certain fees paid on imported goods that are later exported, destroyed, or used to make exported products. Why it matters: Brands that export or return imported goods, such as international DTC orders or returns to vendors, may be able to recover duties. Claims must be filed within five years of import and need records linking the import to the export. Formula: Refund = duties paid on qualifying units × 99%. Example: Duties paid on qualifying units $10,000: Maximum refund = $9,900.00. Q: Can ecommerce brands claim duty drawback on international orders? A: Often yes, if you can link the exported units to import entries where duties were paid and file within five years of import. Unused merchandise drawback allows substitution of commercially interchangeable goods, which helps high-volume sellers; a drawback specialist can assess eligibility. ## Each Picking URL: https://fulfillment.wiki/glossary/each-picking/ Category: Fulfillment & Warehousing Each Picking is picking individual units rather than full cases or pallets, the most common picking type in DTC ecommerce; also called piece picking. Why it matters: Each picking is the most labor-intensive warehouse task per unit, so it drives a large share of fulfillment cost. Slotting, picking methods, and automation choices mostly target it. Q: What is piece picking in a warehouse? A: Piece picking, or each picking, means selecting single units from a storage location to fill an order. It is typical for DTC orders of one to a few items. ## Economic Order Quantity (EOQ) URL: https://fulfillment.wiki/glossary/economic-order-quantity/ Category: Inventory Planning Economic Order Quantity (EOQ) is the order size that minimizes the combined cost of placing orders and holding inventory. Why it matters: A useful starting point, though real purchase quantities are also shaped by supplier MOQs and container fill. Formula: EOQ = √(2 × annual demand × cost per order ÷ annual holding cost per unit). Example: Annual demand 18,000 units, Cost per order $25, Annual holding cost per unit $2.50: EOQ = 600 units. Q: Is EOQ useful for ecommerce brands? A: It is a useful starting point for stable, repeat-purchase SKUs because it balances ordering costs against carrying costs. Supplier MOQs, volume discounts, container sizes, and seasonality usually require adjusting the result. ## Electronic Data Interchange (EDI) URL: https://fulfillment.wiki/glossary/electronic-data-interchange/ Category: Systems & Automation Electronic Data Interchange (EDI) is standardized electronic documents exchanged between trading partners, such as purchase orders (850), invoices (810), and advance ship notices (856). Why it matters: Required by most big-box retailers. EDI errors are a major source of chargebacks. Q: Do I need EDI to sell to retailers? A: Most large US retailers require suppliers to exchange purchase orders, ASNs, and invoices via EDI. Smaller brands often use an EDI provider or their 3PL's EDI service instead of building it in-house. ## Enterprise Resource Planning (ERP) URL: https://fulfillment.wiki/glossary/enterprise-resource-planning/ Category: Systems & Automation Enterprise Resource Planning (ERP) is business software that manages core company records such as finance, purchasing, inventory valuation, and sales orders in one system, often acting as the system of record. Why it matters: As brands grow, the ERP usually becomes the source of truth for inventory value and purchase orders, while the WMS and OMS run daily operations. Integration gaps between them cause inventory and accounting mismatches. Q: Do I need an ERP or an OMS? A: An OMS routes and manages customer orders across channels, while an ERP handles finance, purchasing, and company-wide records. Many smaller brands start with an OMS plus accounting software and add an ERP as complexity grows. ## Entry Summary (CBP Form 7501) URL: https://fulfillment.wiki/glossary/entry-summary/ Category: Import & Customs Entry Summary (CBP Form 7501) is the CBP Form 7501 filing, usually submitted electronically through ACE by a customs broker, that declares classification, value, origin, and duties for an import and accompanies the duty payment. Why it matters: The entry summary is the legal declaration of what you imported and what you owe. It is generally due within 10 working days of release, and its data is what CBP reviews in audits. Q: When is CBP Form 7501 due? A: The entry summary and estimated duties are generally due within 10 working days after the goods are released. Importers on periodic monthly statement can pay duties monthly, but the filing itself must still be timely. ## Ex Works (EXW) URL: https://fulfillment.wiki/glossary/ex-works/ Category: Import & Customs Ex Works (EXW) is an Incoterm where the seller only makes goods available at its own premises and the buyer handles all transport, export clearance, and risk. Why it matters: Lowest quoted price but highest buyer responsibility, including export paperwork in the origin country. Q: Why is Ex Works risky for importers? A: Under EXW, the buyer is responsible for loading at the seller's premises and for export clearance in the seller's country, which can be hard to manage from abroad. Many importers prefer FCA, where the seller loads and clears for export. ## Exchange-First Returns URL: https://fulfillment.wiki/glossary/exchange-first-returns/ Category: Returns Exchange-First Returns is a returns flow that offers an exchange, such as a different size or color or store credit, before offering a refund, so revenue stays with the brand. Why it matters: Exchanges keep revenue and customers that a refund would lose, and apparel brands with sizing returns benefit most. Instant exchanges, shipped before the original item arrives, speed this up but add fraud risk. Q: What is an instant exchange? A: An instant exchange ships the replacement as soon as the customer starts the return, rather than waiting for the original item to arrive. Brands usually place a temporary card hold or use risk rules to protect against items never coming back. ## Fill Rate URL: https://fulfillment.wiki/glossary/fill-rate/ Category: Metrics & Unit Economics Fill Rate is the percentage of customer demand shipped from available stock on the first shipment, measured by units, order lines, or whole orders. Why it matters: Fill rate shows how often inventory gaps force backorders, split shipments, or cancellations. Always state whether you measure units, lines, or orders, because the numbers differ. Formula: Unit fill rate = units shipped on first shipment ÷ units ordered × 100. Example: Units shipped on first shipment 9,700 units, Units ordered 10,000 units: Unit fill rate = 97.0%. Q: What is the difference between unit fill rate and order fill rate? A: Unit fill rate counts the share of ordered units shipped complete on the first shipment. Order fill rate counts only orders where every unit shipped together, so it is always equal to or lower than unit fill rate. ## First Expired, First Out (FEFO) URL: https://fulfillment.wiki/glossary/fefo/ Category: Inventory Planning First Expired, First Out (FEFO) is a rotation rule where the units with the earliest expiration date ship first, regardless of when they were received. Why it matters: Essential for food, beverage, supplements, and beauty products. Amazon requires minimum remaining shelf life for dated products. Q: What is the difference between FIFO and FEFO? A: FIFO ships the units received first, while FEFO ships the units that expire first. For dated products they usually match, but FEFO is safer when inbound lots arrive with different remaining shelf lives. ## First In, First Out (FIFO) URL: https://fulfillment.wiki/glossary/fifo/ Category: Inventory Planning First In, First Out (FIFO) is a rotation rule where the oldest inventory is shipped first. Why it matters: Prevents aging stock and packaging changes from getting stuck at the back of the shelf. Also an accounting method for valuing inventory. Q: Is FIFO a warehouse method or an accounting method? A: Both. In the warehouse it means shipping the oldest received units first. In accounting it means assigning the cost of the oldest inventory to COGS first; the two do not have to match. ## First Mile URL: https://fulfillment.wiki/glossary/first-mile/ Category: Parcel Shipping First Mile is the leg from the brand's or 3PL's warehouse to the carrier's first sorting facility. Why it matters: Missed pickups or late first-mile scans make shipments look late even when the warehouse shipped on time. Q: What is first-mile delivery in ecommerce? A: First mile is the movement of packages from your warehouse or store to the carrier's first sorting facility. It is usually handled by carrier pickup, a consolidator, or a drop-off. ## Flat Rate Shipping URL: https://fulfillment.wiki/glossary/flat-rate-shipping/ Category: Parcel Shipping Flat Rate Shipping is a carrier pricing option, best known from USPS Priority Mail Flat Rate, that charges one price for a specific box or envelope regardless of weight or destination zone, up to 70 pounds. Why it matters: Flat rate works best for heavy, compact items shipped to far zones. For light items, zone-based or cubic rates are usually cheaper. Q: Is USPS flat rate always cheaper? A: No. Flat rate tends to win for heavy items going long distances, while light packages or short-zone shipments are usually cheaper at weight-based or cubic rates. Compare both for your typical order profile. ## Floor-Loaded URL: https://fulfillment.wiki/glossary/floor-loaded/ Category: Freight & Retail Compliance Floor-Loaded is a loading method in which cartons are stacked directly on the floor of a container or trailer rather than on pallets, maximizing cube use but requiring manual unloading. Why it matters: Floor-loading ocean containers lets brands fit more units per box and lowers freight cost per unit. The tradeoff is higher receiving fees, since 3PLs usually charge per carton or by container to unload and palletize. Q: Is it better to floor-load or palletize an ocean container? A: Floor-loading usually fits more cartons and lowers freight cost per unit, but unloading takes longer and costs more at the warehouse. Palletized loads unload faster and cut receiving labor, so compare the freight savings against your 3PL's devanning fees. ## Forecast Accuracy URL: https://fulfillment.wiki/glossary/forecast-accuracy/ Category: Metrics & Unit Economics Forecast Accuracy is a measure of how close forecast demand was to actual demand, commonly expressed as 100% minus the mean absolute percentage error (MAPE) across SKUs or periods. Why it matters: Forecast accuracy shows how much safety stock you need and where planning effort pays off. Measure it at the level you buy, usually SKU by month. Formula: MAPE = average of |actual − forecast| ÷ actual; forecast accuracy = 100% − MAPE. Example: SKU A actual 100 units, SKU A forecast 90 units, SKU B actual 200 units, SKU B forecast 230 units, SKU C actual 50 units, SKU C forecast 45 units: MAPE = 11.7%; Forecast accuracy = 88.3%. Q: What is MAPE in forecasting? A: MAPE, or mean absolute percentage error, is the average of the absolute differences between forecast and actual, each divided by the actual. Lower MAPE means a more accurate forecast; it is unreliable for SKUs with very low or zero sales. ## Foreign-Trade Zone (FTZ) URL: https://fulfillment.wiki/glossary/foreign-trade-zone/ Category: Import & Customs Foreign-Trade Zone (FTZ) is a designated, CBP-supervised area in the US where foreign goods can be stored, processed, or assembled without paying US duties until they enter US commerce. Why it matters: FTZs let importers defer duty, avoid duty on re-exported or scrapped goods, and in some cases pay a lower rate on finished goods. Some tariff actions have limited FTZ benefits, so confirm treatment for each duty type. Q: Can an ecommerce fulfillment center operate in a foreign-trade zone? A: Yes. Some 3PLs operate FTZ sites so that duty is paid only on units shipped to US customers, while exports are duty-free. Running inside an FTZ requires inventory control systems that meet CBP requirements. ## Forward Pick Replenishment URL: https://fulfillment.wiki/glossary/forward-pick-replenishment/ Category: Fulfillment & Warehousing Forward Pick Replenishment is moving inventory from reserve or bulk storage to forward pick locations so they stay stocked for order picking, triggered by min/max levels, demand, or scheduled waves. Why it matters: When replenishment lags, pickers hit empty locations and orders are short-shipped or delayed even though the warehouse has the stock. Good triggers matter most during peak season. Q: When should a warehouse replenish pick locations? A: Common methods trigger a move when a location drops below a minimum quantity, or replenish ahead of an order wave based on what the wave needs. Many warehouses replenish during off-shift hours to avoid congestion. ## Fourth-Party Logistics (4PL) URL: https://fulfillment.wiki/glossary/fourth-party-logistics/ Category: Fulfillment & Warehousing Fourth-Party Logistics (4PL) is a provider that manages a brand's whole logistics network, including choosing and coordinating multiple 3PLs, carriers, and freight forwarders, rather than operating warehouses itself. Why it matters: Useful when a brand runs several warehouses, wholesale channels, and import lanes and needs one party accountable for the network. Q: What is the difference between a 3PL and a 4PL? A: A 3PL operates warehouses and performs fulfillment. A 4PL manages and coordinates multiple logistics providers, which may include several 3PLs and carriers, on the brand's behalf. ## Free Carrier (FCA) URL: https://fulfillment.wiki/glossary/free-carrier/ Category: Import & Customs Free Carrier (FCA) is an Incoterms rule in which the seller delivers goods, cleared for export, to the carrier or person the buyer nominates at a named place, where risk passes to the buyer. Why it matters: FCA works for any transport mode and fits containerized freight better than FOB, because risk passes when the supplier hands goods to the forwarder. It is a common choice for brands that control their own freight. Q: Should I use FCA or FOB for container shipments? A: FCA is generally better for containers because risk transfers when the supplier hands goods to your carrier or forwarder, often at a warehouse or container yard. FOB is meant for goods loaded on board a vessel, which suits bulk cargo more than containers. ## Free on Board (FOB) URL: https://fulfillment.wiki/glossary/free-on-board/ Category: Import & Customs Free on Board (FOB) is an Incoterm where the seller delivers goods loaded onto the vessel at the named port of origin, after which the buyer bears cost and risk. Why it matters: The most common term for ocean imports from Asia. The buyer controls the forwarder and ocean freight. Q: Who pays freight under FOB terms? A: Under FOB, the seller pays costs to load goods on board the vessel at the named origin port, and the buyer pays ocean freight, insurance, and all destination costs. Risk transfers to the buyer once goods are on board. ## Free Time URL: https://fulfillment.wiki/glossary/free-time/ Category: Import & Customs Free Time is the number of days a terminal or ocean carrier allows an importer to pick up a container or return empty equipment before demurrage or detention charges begin. Why it matters: Free time is often only a few days, and charges per day can climb fast. Negotiating more free time in your ocean contract and booking drayage early are the main ways to avoid them. Q: How many days of free time do ocean containers usually get? A: It varies by carrier, port, and contract, but a few calendar or working days is common. Check your bill of lading terms and any contract with the carrier, because extra free time is often negotiable. ## Freight Broker URL: https://fulfillment.wiki/glossary/freight-broker/ Category: Freight & Retail Compliance Freight Broker is a licensed intermediary that arranges truck transportation by matching a shipper's load with a motor carrier, without operating the trucks itself, and earns the margin between the shipper rate and carrier rate. Why it matters: Brokers give brands access to large carrier networks and quick truckload quotes without managing carrier contracts. In the US, brokers need FMCSA broker authority and a $75,000 surety bond or trust fund; verify both before tendering freight. Q: What is the difference between a freight broker and a carrier? A: A carrier owns or leases trucks and physically moves the freight under its own operating authority. A broker arranges the move with a carrier for you, so your contract and payment run through the broker while the carrier is responsible for the goods in transit. ## Freight Claim URL: https://fulfillment.wiki/glossary/freight-claim/ Category: Freight & Retail Compliance Freight Claim is a written demand to a carrier for payment of loss, damage, or delay to goods in its care, supported by the bill of lading, delivery receipt, invoice, and proof of value. Why it matters: Under US rules, claims against interstate motor carriers generally must be filed within nine months of delivery, and carriers often limit liability per pound. Check liability limits before shipping high-value goods, and buy cargo insurance if they are too low. Q: How long do I have to file a freight claim with a US trucking carrier? A: For interstate shipments under the Carmack Amendment, carriers can require claims within no less than nine months from delivery, and nine months is the common deadline. If the carrier declines the claim, you generally have at least two years from the declination to file suit. ## Freight Class URL: https://fulfillment.wiki/glossary/freight-class/ Category: Freight & Retail Compliance Freight Class is a National Motor Freight Classification (NMFC) rating from 50 to 500 that LTL carriers use to price shipments based on density, handling, stowability, and liability. Why it matters: Lower density usually means a higher class and a higher price. NMFC Docket 2025-1 (effective July 19, 2025) moved most commodities to a 13-tier density scale and added classes 50 and 55 to it, so recheck the class and density on your bills of lading. Q: How is LTL freight class determined now? A: Since NMFC Docket 2025-1 took effect on July 19, 2025, most commodities are classed by density on a 13-tier scale, with some items still classed by specific NMFC rules. Measure and weigh each pallet accurately and confirm the NMFC item number with your carrier or TMS. ## Freight Density URL: https://fulfillment.wiki/glossary/freight-density/ Category: Freight & Retail Compliance Freight Density is the weight of a shipment divided by its cubic volume, expressed in pounds per cubic foot, which determines the freight class for most LTL commodities. Why it matters: Since NMFC Docket 2025-1, density drives class for most products, so accurate pallet dimensions and weight directly change what you pay. Tight, square pallets with no overhang lower your class and cost. Formula: Density (lb/ft³) = weight (lb) ÷ (L × W × H in inches ÷ 1,728). Example: Length 48 in, Width 40 in, Height 50 in, Weight 500 lb: Volume = 55.6 cubic feet; Density = 9.0 lb per cubic foot. Q: How do I calculate freight density for an LTL pallet? A: Multiply length, width, and height in inches, divide by 1,728 to get cubic feet, then divide the total weight in pounds by that number. Measure the outermost points, including the pallet and any overhang. ## Freight Forwarder URL: https://fulfillment.wiki/glossary/freight-forwarder/ Category: Import & Customs Freight Forwarder is a company that books and coordinates international shipments across carriers, ports, and customs on behalf of a shipper. Why it matters: Most brands importing from Asia rely on a forwarder for ocean booking, documentation, and often customs brokerage. Q: What is the difference between a freight forwarder and a customs broker? A: A freight forwarder arranges the transport of goods, such as booking ocean or air space and coordinating pickup and delivery. A customs broker is licensed to file entries and clear goods through US Customs; many companies offer both services. ## Freight Reclassification URL: https://fulfillment.wiki/glossary/freight-reclassification/ Category: Freight & Retail Compliance Freight Reclassification is a correction an LTL carrier makes to a shipment's freight class or weight after inspecting or reweighing it, which reissues the bill at the corrected class and usually adds an inspection fee. Why it matters: Reclasses and reweighs are a frequent source of surprise LTL charges. Recording measured dimensions, weights, and photos at pickup is the best evidence for disputing them. Q: How do I dispute an LTL reclassification or reweigh charge? A: Request the carrier's inspection certificate or weight and inspection report, then compare it to your own measurements, scale tickets, and photos taken at pickup. Submit a written dispute with that evidence promptly, as most carriers set time limits in their tariff. ## Fuel Surcharge URL: https://fulfillment.wiki/glossary/fuel-surcharge/ Category: Parcel Shipping Fuel Surcharge is a percentage added to transportation charges that moves with published diesel or jet fuel price indexes. Why it matters: Applies to parcel and freight. Because it is a percentage, it also applies on top of many other surcharges. Q: How often do fuel surcharges change? A: UPS and FedEx adjust fuel surcharge percentages weekly based on published fuel price indexes. The percentage is applied to the base rate and many other surcharges. ## Fulfillment by Amazon (FBA) URL: https://fulfillment.wiki/glossary/fulfillment-by-amazon/ Category: Fulfillment & Warehousing Fulfillment by Amazon (FBA) is Amazon's service in which sellers send inventory to Amazon fulfillment centers and Amazon picks, packs, ships, and handles returns. Why it matters: Gives listings Prime eligibility. Watch inbound placement fees, capacity limits, and aged-inventory surcharges. Q: Can I use FBA inventory for orders from my own website? A: Yes, Amazon offers Multi-Channel Fulfillment, which ships orders from other channels using inventory stored in Amazon's network. Fees and packaging rules differ from standard FBA orders. ## Fulfillment by Merchant (FBM) URL: https://fulfillment.wiki/glossary/fulfillment-by-merchant/ Category: Fulfillment & Warehousing Fulfillment by Merchant (FBM) is selling on Amazon while the seller or its 3PL stores and ships the orders. Why it matters: Useful for oversized, slow-moving, or high-value items and as a backup when FBA stock runs out. Q: When is FBM better than FBA? A: FBM can make sense for oversized, slow-moving, or highly customized products where FBA fees or rules are costly. The seller must still meet Amazon's shipping and performance standards. ## Fulfillment Center (FC) URL: https://fulfillment.wiki/glossary/fulfillment-center/ Category: Fulfillment & Warehousing Fulfillment Center (FC) is a warehouse built to process high volumes of small customer orders, as opposed to a distribution center that mainly ships full cases and pallets to stores. Why it matters: Layout, labor model, and automation in an FC are tuned for eaches (single units), not pallets, which is why B2B and DTC orders often flow through different processes even in the same building. Q: What is the difference between a fulfillment center and a warehouse? A: A warehouse mainly stores goods, while a fulfillment center is a warehouse set up to pick, pack, and ship many individual customer orders quickly. Most ecommerce 3PLs operate fulfillment centers. ## Fulfillment Cost as Percent of Revenue URL: https://fulfillment.wiki/glossary/fulfillment-cost-as-percent-of-revenue/ Category: Metrics & Unit Economics Fulfillment Cost as Percent of Revenue is the share of net revenue spent on warehousing and order fulfillment, including storage, receiving, pick and pack, and packaging, with outbound postage either included or reported separately. Why it matters: Expressing fulfillment as a percent of revenue lets finance compare logistics spend with marketing and COGS. A rising percent can come from lower AOV even when cost per order is flat. Formula: Fulfillment cost % = (storage + receiving + pick and pack + packaging) ÷ net revenue × 100. Example: Storage $8,000, Receiving $2,000, Pick and pack $30,000, Packaging $5,000, Net revenue $500,000: Fulfillment cost = 9.0%. Q: Should fulfillment cost as a percent of revenue include shipping? A: Definitions vary, so state yours. Many brands report fulfillment (warehouse) cost and shipping (postage) cost as separate percentages, plus a combined total, so changes in carrier rates do not hide warehouse performance. ## Full Container Load (FCL) URL: https://fulfillment.wiki/glossary/full-container-load/ Category: Import & Customs Full Container Load (FCL) is an ocean shipment that fills, or is booked as, an entire container for one shipper. Why it matters: Cheaper per unit than LCL at higher volumes and less handling risk. Q: When does FCL become cheaper than LCL? A: For many lanes, FCL becomes cheaper than LCL somewhere around 13 to 15 cubic meters, roughly half a 20-foot container, but it depends on current rates. Compare the all-in FCL cost against LCL per cubic meter charges plus origin and destination fees. ## Full Truckload (FTL) URL: https://fulfillment.wiki/glossary/full-truckload/ Category: Freight & Retail Compliance Full Truckload (FTL) is a shipment that uses an entire trailer, usually a 53-foot dry van in the US, moving directly from origin to destination. Why it matters: Faster and less handling than LTL. Often cheaper per unit once a shipment fills roughly half a trailer or more. Q: How many pallets do I need before full truckload beats LTL? A: There is no fixed cutoff, but truckload often becomes competitive somewhere around 10 to 12 or more pallets, or when weight approaches LTL volume limits. Get both quotes, since lane, season, and freight density change the break-even point. ## General Order (GO) URL: https://fulfillment.wiki/glossary/general-order/ Category: Import & Customs General Order (GO) is the status of imported goods not entered with US Customs within 15 calendar days of arrival, which are then moved to a general order warehouse at the importer's expense. Why it matters: GO storage fees accumulate fast, and goods left unclaimed for six months can be sold at auction. Clear documentation and an active broker prevent it. Q: What happens if my shipment goes to general order? A: CBP moves the goods to a general order warehouse, where storage and handling charges accrue. You can still file entry and recover them by paying those charges, but goods unclaimed after six months may be sold. ## General Rate Increase (GRI) URL: https://fulfillment.wiki/glossary/general-rate-increase/ Category: Parcel Shipping General Rate Increase (GRI) is a carrier's annual list-price increase, typically announced in the fall and effective in January. Why it matters: The headline average often understates the real increase for your shipping profile once surcharges are included. Model it against your own shipment data. Q: When do UPS and FedEx raise rates each year? A: UPS and FedEx typically announce their general rate increase in the fall and apply it in late December or early January. The headline average often understates the increase for a specific shipping profile. ## Global Trade Item Number (GTIN) URL: https://fulfillment.wiki/glossary/global-trade-item-number/ Category: Inventory Planning Global Trade Item Number (GTIN) is the GS1 family of product identifiers (GTIN-8, -12, -13, -14) used worldwide to identify items and cases. Why it matters: GTIN-14 identifies cases and inner packs, which retailers and 3PLs use when receiving in bulk. Q: Is a GTIN the same as a UPC? A: A UPC is one type of GTIN. GTIN is the GS1 family of product identifiers that includes the 12-digit UPC (GTIN-12), the 13-digit EAN (GTIN-13), and the 14-digit case-level GTIN-14. ## Goods-to-Person (GTP) URL: https://fulfillment.wiki/glossary/goods-to-person/ Category: Systems & Automation Goods-to-Person (GTP) is a fulfillment model where automation brings inventory to a stationary picker at a workstation, instead of the picker walking to the inventory. Why it matters: Removes most walking from picking, which can be over half of a picker's time in a manual operation. GTP systems also store goods more densely. Q: How does goods-to-person picking improve productivity? A: It removes most of the walking a picker would do, since storage robots or machines bring inventory to a fixed station. This can raise picks per hour and makes better use of storage space. ## Gross Margin URL: https://fulfillment.wiki/glossary/gross-margin/ Category: Metrics & Unit Economics Gross Margin is revenue minus cost of goods sold, expressed in dollars or as a percentage of revenue, showing what is left from sales after the direct cost of the products. Why it matters: Gross margin sets the budget for shipping, fulfillment, marketing, and overhead. Calculate it with landed cost, not factory cost, or it will be overstated. Formula: Gross margin % = (net revenue − COGS) ÷ net revenue × 100. Example: Net revenue $500,000, COGS $200,000: Gross profit = $300,000; Gross margin = 60.0%. Q: What is the difference between gross margin and markup? A: Gross margin divides profit by the selling price, while markup divides profit by the cost. An item that costs $40 and sells for $100 has a 60% gross margin but a 150% markup. ## Gross Margin Return on Investment (GMROI) URL: https://fulfillment.wiki/glossary/gross-margin-return-on-investment/ Category: Metrics & Unit Economics Gross Margin Return on Investment (GMROI) is a ratio showing how many dollars of gross margin a business earns for each dollar invested in inventory, measured at cost over a period. Why it matters: GMROI combines margin and turnover in one number, so it flags SKUs that look profitable per unit but tie up too much cash. A GMROI below 1.0 means the SKU earns less margin than the inventory invested in it. Formula: GMROI = gross margin dollars ÷ average inventory at cost. Example: Gross margin dollars $300,000, Average inventory at cost $100,000: GMROI = 3.00. Q: What is a good GMROI? A: It depends on category, but a GMROI above 1.0 means inventory earns back more than its cost in gross margin over the period. Retailers often aim well above that for annual GMROI, and it is most useful for comparing SKUs and categories within your own business. ## GS1-128 Label URL: https://fulfillment.wiki/glossary/gs1-128-label/ Category: Freight & Retail Compliance GS1-128 Label is a standardized shipping label printed with the GS1-128 barcode symbology that encodes a carton or pallet's SSCC and, optionally, data such as purchase order and ship-to location. Why it matters: Most US retailers require GS1-128 labels on every carton or pallet, matched to the EDI 856 advance ship notice. Wrong placement, unreadable barcodes, or SSCCs that do not match the ASN are common chargeback triggers. Q: Is a GS1-128 label the same as a UCC-128 label? A: Yes. UCC-128 is the older name for the same barcode standard, and many retailer routing guides still use it. Both refer to the label carrying the SSCC barcode. ## Harbor Maintenance Fee (HMF) URL: https://fulfillment.wiki/glossary/harbor-maintenance-fee/ Category: Import & Customs Harbor Maintenance Fee (HMF) is a US fee charged as a percentage of the value of commercial cargo loaded or unloaded at certain US ports, applying to ocean shipments but not air or most land imports. Why it matters: HMF adds a small percentage to the cost of every ocean import and belongs in landed cost. It is one reason air and ocean entries for the same goods show different fees. Formula: HMF = cargo value × HMF rate. Check current CBP guidance for the rate. Example: Cargo value $50,000, HMF rate 0.125%: HMF = $62.50. Q: Do air shipments pay the harbor maintenance fee? A: No. HMF applies to cargo moving through covered US seaports, so ocean imports pay it while air freight does not. MPF applies to both. ## Harmonized System Code (HS Code) URL: https://fulfillment.wiki/glossary/harmonized-system-code/ Category: Import & Customs Harmonized System Code (HS Code) is a six-digit product classification code from the World Customs Organization's international Harmonized System, used as the base for national tariff schedules worldwide. Why it matters: The first six digits of a US HTS code are the HS code, so they match across most countries. When shipping internationally, use the HS code on customs forms and let the destination country's longer code set the duty. Q: What is the difference between an HS code and an HTS code? A: An HS code is the six-digit international base classification. The US HTS code adds four more digits, eight for the tariff line and two statistical, to set US duty rates. ## Harmonized Tariff Schedule (HTS) URL: https://fulfillment.wiki/glossary/harmonized-tariff-schedule/ Category: Import & Customs Harmonized Tariff Schedule (HTS) is the US system of product classification codes (based on the international Harmonized System) that determines duty rates for imports. Why it matters: Duties and additional tariffs are set by HTS code and country of origin. Misclassification can lead to penalties or overpaid duties. Q: How do I find the correct HTS code for my product? A: Search the HTS on the US International Trade Commission website using the product's material, function, and use, then apply the General Rules of Interpretation. For uncertain items, ask your customs broker or request a binding ruling from CBP. ## Hazardous Materials Shipping (hazmat) URL: https://fulfillment.wiki/glossary/hazardous-materials-shipping/ Category: Parcel Shipping Hazardous Materials Shipping (hazmat) is the regulated shipping of goods classified as dangerous, such as aerosols, flammable liquids, and lithium batteries, which requires correct classification, packaging, marking, and carrier approval. Why it matters: Many everyday DTC products, including perfume, nail polish, and aerosol cosmetics, are hazmat. Many small quantities ship by ground under the limited quantity marking, which replaced the ORM-D marking that was phased out at the end of 2020. Q: Is perfume considered hazmat for shipping? A: Yes. Most perfumes contain alcohol and are classified as flammable liquids. Small retail containers can often ship by ground as limited quantity, but air shipping has stricter rules. ## Hazmat Storage URL: https://fulfillment.wiki/glossary/hazmat-storage/ Category: Fulfillment & Warehousing Hazmat Storage is storing products classified as hazardous materials, such as aerosols, flammable liquids, or lithium batteries, in areas and ways that meet fire codes and safety regulations. Why it matters: Many common ecommerce products, including perfume, nail polish, and devices with lithium batteries, are regulated for storage and shipping. Not every 3PL can accept them, and carriers have specific packaging and labeling rules. Q: Are perfume and nail polish considered hazmat? A: Often yes, because many contain flammable liquids, and carriers may allow them under limited quantity rules with specific marking. Confirm the classification using the product's safety data sheet before choosing a 3PL or carrier service. ## House Bill of Lading (HBL) URL: https://fulfillment.wiki/glossary/house-bill-of-lading/ Category: Import & Customs House Bill of Lading (HBL) is a bill of lading issued by a freight forwarder or NVOCC to its shipper customer, as distinct from the master bill of lading the ocean carrier issues to the forwarder. Why it matters: When you book through a forwarder, your shipment travels on its house bill while the carrier only sees the master bill. Both numbers matter for tracking, ISF filing, and customs release. Q: What is the difference between a house bill and a master bill of lading? A: The master bill is issued by the ocean carrier to the forwarder or NVOCC and covers the whole container or consolidation. The house bill is issued by that forwarder to each shipper and covers that shipper's goods. ## IEEPA Tariffs URL: https://fulfillment.wiki/glossary/ieepa-tariffs/ Category: Import & Customs IEEPA Tariffs is additional US import duties imposed by executive order in 2025 under the International Emergency Economic Powers Act, applied by country of origin. Why it matters: On February 20, 2026, the Supreme Court held in Learning Resources v. Trump that IEEPA does not authorize tariffs. Importers who paid these duties may be owed refunds through CBP processes set after follow-on litigation, so keep entry records and work with your customs broker. Other tariff authorities, such as Section 301, are unaffected. Q: Are IEEPA tariffs still in effect? A: No. The Supreme Court ruled on February 20, 2026 that IEEPA does not authorize tariffs. Refund procedures for duties already paid have been set through the Court of International Trade and CBP, so check current CBP guidance or ask your customs broker. ## Importer of Record (IOR) URL: https://fulfillment.wiki/glossary/importer-of-record/ Category: Import & Customs Importer of Record (IOR) is the party legally responsible for an import into the US, including correct classification, valuation, and origin, payment of duties, and compliance with all import laws. Why it matters: The IOR carries the liability for duties and penalties, even if a broker files the entry. Brands that sell DDP or use a supplier as IOR should confirm who holds that role and whose bond and number appear on the entry. Q: Can my overseas supplier act as importer of record? A: Yes, a foreign company can act as importer of record if it gets an IOR number and a US customs bond, often through a resident agent and broker. The brand then has less control and visibility over classification, valuation, and duty costs. ## Importer Security Filing (ISF) URL: https://fulfillment.wiki/glossary/importer-security-filing/ Category: Import & Customs Importer Security Filing (ISF) is a US filing, also called 10+2, that ocean importers must submit to CBP at least 24 hours before cargo is loaded on the vessel abroad. Why it matters: Late or missing ISF filings can result in penalties and cargo holds. Q: When is the ISF due and what happens if it is late? A: The ISF must be filed at least 24 hours before cargo is loaded on the vessel at the foreign port for ocean shipments to the US. Late, inaccurate, or missing filings can bring liquidated damages of up to $5,000 per violation and can trigger holds or exams. ## In-Transit Inventory URL: https://fulfillment.wiki/glossary/in-transit-inventory/ Category: Inventory Planning In-Transit Inventory is goods that have left a supplier or another warehouse but have not yet been received at their destination, whether on the ocean, in a truck, or moving between fulfillment centers. Why it matters: In-transit stock is often already paid for and may count on your balance sheet depending on Incoterms. Planning should include it in inventory position so you do not reorder units already on the way. Q: Who owns inventory while it is in transit? A: Ownership usually follows the agreed shipping terms. Under terms like FOB origin or EXW the buyer generally owns goods once they leave the supplier, while under DDP the seller carries the risk until delivery. ## Incoterms URL: https://fulfillment.wiki/glossary/incoterms/ Category: Import & Customs Incoterms is standard trade terms published by the International Chamber of Commerce that define which party pays for and bears risk in each leg of an international shipment. Why it matters: The Incoterm on a supplier quote changes your landed cost. FOB and EXW prices are not comparable without adjusting. Q: Which Incoterm should an ecommerce brand use when buying from overseas suppliers? A: Many brands use FOB or FCA so they control the main freight leg and choose their own forwarder. Use DDP only if you want the supplier to handle import clearance and duties, and confirm who acts as importer of record. ## Injection URL: https://fulfillment.wiki/glossary/injection/ Category: Parcel Shipping Injection is delivering presorted parcels directly into a carrier's facility (for example a USPS destination delivery unit) rather than having the carrier pick them up. Why it matters: Postal injection through consolidators can lower costs for lightweight packages. Q: What does parcel injection mean? A: Injection means delivering packages directly into a carrier's network at a facility close to the destination, rather than handing them over at origin. Carriers price injected packages lower because they travel less within the carrier network. ## Inner Pack URL: https://fulfillment.wiki/glossary/inner-pack/ Category: Freight & Retail Compliance Inner Pack is a smaller package inside a master carton that groups a set number of units, used to protect product or match the quantity a store or customer orders. Why it matters: Inner packs let retailers order in smaller increments than a full case and let warehouses pick sub-case quantities without breaking open loose units. They should carry their own barcode if they are a sellable or orderable unit. Q: Does an inner pack need its own barcode? A: If the inner pack is ordered, stocked, or scanned as its own unit, give it a distinct GTIN and barcode so systems do not confuse it with the single unit or the master carton. If it is never handled separately, a barcode is usually not required. ## Intermodal Freight URL: https://fulfillment.wiki/glossary/intermodal-freight/ Category: Freight & Retail Compliance Intermodal Freight is freight moved in a single container or trailer across more than one mode, most commonly a domestic or international container hauled by rail for the long haul and by truck at each end. Why it matters: Domestic intermodal is often cheaper than over-the-road truckload on long lanes, at the cost of a few extra transit days. It suits replenishment freight that is planned well ahead. Q: Is intermodal cheaper than truckload? A: On long lanes, typically over several hundred miles, intermodal is usually cheaper than truckload, but transit is slower and less predictable. On short lanes, the extra drayage at each end often erases the savings. ## Inventory Accuracy URL: https://fulfillment.wiki/glossary/inventory-accuracy/ Category: Metrics & Unit Economics Inventory Accuracy is how closely the inventory quantities in the system match what is physically in the warehouse. Why it matters: Low accuracy causes overselling, cancellations, and wasted safety stock. Formula: Inventory accuracy = locations (or SKUs) with matching counts ÷ locations counted × 100. Example: Locations with matching counts 990 locations, Locations counted 1,000 locations: Inventory accuracy = 99.0%. Q: What inventory accuracy should I expect from a 3PL? A: Many 3PL contracts commit to 99% or higher inventory accuracy, measured by cycle counts. Check how the contract defines accuracy, since unit-level and location-level measures give different results. ## Inventory Reconciliation URL: https://fulfillment.wiki/glossary/inventory-reconciliation/ Category: Inventory Planning Inventory Reconciliation is the process of comparing inventory quantities across systems such as the WMS, ecommerce platform, marketplaces, and accounting ledger, and against physical counts, then investigating and correcting variances. Why it matters: Brands using a 3PL often find units missing between what was shipped from the factory, what was received, and what is sellable. Regular reconciliation catches lost inbound units, receiving errors, and sync failures before they become write-offs. Q: How often should an ecommerce brand reconcile inventory with its 3PL? A: Many brands reconcile monthly to match the accounting close, with weekly checks on fast-moving or high-value SKUs. Every inbound shipment should also be reconciled against its purchase order and packing list when received. ## Inventory Synchronization URL: https://fulfillment.wiki/glossary/inventory-synchronization/ Category: Systems & Automation Inventory Synchronization is keeping available inventory quantities consistent across a warehouse system and every sales channel, so each storefront and marketplace shows what can actually be shipped. Why it matters: Poor sync leads to overselling, cancelled orders, and marketplace penalties, or to underselling when stock is hidden. Sync frequency and safety buffers matter most for fast sellers listed on several channels. Q: Why does my store oversell even with inventory sync? A: Common causes are sync delays between systems, orders arriving on several channels at once, and inaccurate warehouse counts. Holding back a small buffer on low-stock SKUs and syncing more often reduces overselling. ## Inventory Turnover URL: https://fulfillment.wiki/glossary/inventory-turnover/ Category: Metrics & Unit Economics Inventory Turnover is how many times a brand sells through its average inventory in a period. Why it matters: Higher turnover means less cash tied up and lower storage fees. Compare it within your category; apparel and consumables turn very differently. Formula: Inventory turnover = cost of goods sold ÷ average inventory at cost. Example: Cost of goods sold for the year $1,200,000, Average inventory at cost $200,000: Inventory turnover = 6.0 times a year; Average days to sell through = 60.8 days. Q: What is a good inventory turnover ratio for an ecommerce brand? A: It varies by category, so compare against your own history and similar products. Fast-moving consumables usually turn much more often than seasonal apparel or durable goods, and a rising trend is generally a good sign as long as stockouts are not increasing. ## Inventory Write-Off URL: https://fulfillment.wiki/glossary/inventory-write-off/ Category: Inventory Planning Inventory Write-Off is an accounting entry that removes the value of inventory from the books because it can no longer be sold, such as expired, damaged, lost, or obsolete units. Why it matters: Write-offs reduce gross profit in the period recorded. A rising write-off total points to forecasting, handling, or shelf-life problems. Q: What is the difference between an inventory write-off and a write-down? A: A write-off removes the full value of inventory that has no remaining value. A write-down reduces the recorded value of inventory that is still sellable but worth less than its cost, such as items that will need deep discounts. ## Inventory-to-Sales Ratio URL: https://fulfillment.wiki/glossary/inventory-to-sales-ratio/ Category: Metrics & Unit Economics Inventory-to-Sales Ratio is the value of inventory on hand at the end of a period divided by sales for that period, showing how many months of sales current inventory represents. Why it matters: A rising ratio warns that inventory is building faster than sales. The US Census Bureau publishes this ratio for retail, which gives context for a brand's own trend. Formula: Inventory-to-sales ratio = ending inventory value ÷ sales for the period. With monthly sales, the ratio reads as months of sales on hand. Use the same valuation basis, cost or retail, for both numbers. Example: Ending inventory value $450,000, Sales for the period $300,000: Inventory-to-sales ratio = 1.50. Q: How is the inventory-to-sales ratio different from inventory turnover? A: The inventory-to-sales ratio is a point-in-time comparison of ending inventory to one period's sales, often monthly. Inventory turnover measures how many times average inventory is sold over a longer period, usually using cost of goods sold. ## Kitting URL: https://fulfillment.wiki/glossary/kitting/ Category: Fulfillment & Warehousing Kitting is assembling multiple SKUs into one ready-to-ship unit, such as a gift set or subscription box, before orders arrive. Why it matters: Pre-built kits speed up peak-season packing. 3PLs usually bill kitting as a separate per-unit or hourly service. Q: What is the difference between kitting and bundling? A: The terms are often used loosely. Kitting usually means physically assembling items into one unit ahead of orders, while bundling can also mean selling items together as one listing and picking them separately at order time. ## Labor Management System (LMS) URL: https://fulfillment.wiki/glossary/labor-management-system/ Category: Systems & Automation Labor Management System (LMS) is software that measures worker productivity against engineered or historical standards, forecasts labor needs, and supports staffing, incentives, and coaching in a warehouse. Why it matters: Labor is often the largest fulfillment cost, so measuring units per hour and planning staff by forecast keeps costs predictable, especially when adding seasonal workers for peak. Q: What does a labor management system track? A: It typically tracks tasks completed, time per task, and performance against a standard for each worker or team. It also helps forecast how many people each shift needs. ## Landed Cost URL: https://fulfillment.wiki/glossary/landed-cost/ Category: Metrics & Unit Economics Landed Cost is the total cost of getting a product to your warehouse ready to sell: purchase price plus freight, insurance, duties, tariffs, brokerage, and handling. Why it matters: Gross margin calculated on factory price alone overstates profit, especially when tariffs change. Formula: Landed cost per unit = (product cost + freight + insurance + duties and tariffs + brokerage + drayage and handling) ÷ units. Example: Product cost $20,000, Freight $3,000, Insurance $200, Duties and tariffs $2,500, Brokerage $300, Drayage and handling $1,000, Units in the shipment 2,000 units: Landed cost per unit = $13.50. Q: What costs are included in landed cost? A: Landed cost includes the product price plus freight, insurance, duties and tariffs, customs brokerage, drayage, and handling needed to get the product into your warehouse. Outbound shipping to customers is not part of landed cost. ## Last Mile URL: https://fulfillment.wiki/glossary/last-mile/ Category: Parcel Shipping Last Mile is the final leg of delivery from a local station or hub to the customer's door. Why it matters: The most expensive leg per package and the one customers see. Q: Why is last-mile delivery so expensive? A: Each stop serves only one or a few packages, so drivers, vehicles, and failed attempts are spread over little volume. Residential and rural deliveries are the most costly per package. ## Lead Time URL: https://fulfillment.wiki/glossary/lead-time/ Category: Inventory Planning Lead Time is the total time from placing a purchase order to having inventory available to sell, including production, transit, customs, and receiving. Why it matters: Brands often underestimate lead time by counting only production and ocean transit, then stock out while goods sit at the port or the 3PL dock. Q: What should be included in supplier lead time? A: Use the full time from placing the purchase order to inventory being available to sell, including production, transit, customs clearance, and receiving at the warehouse. Using only the production time leads to stockouts. ## Less-than-Container Load (LCL) URL: https://fulfillment.wiki/glossary/less-than-container-load/ Category: Import & Customs Less-than-Container Load (LCL) is an ocean shipment that shares a container with other shippers' cargo, consolidated and deconsolidated at warehouses. Why it matters: Good for smaller orders but adds handling time at both ends. Q: Why does LCL take longer than FCL? A: LCL cargo must be consolidated with other shippers' goods at an origin warehouse and deconsolidated at destination, which adds handling and waiting time. A customs hold on any shipment in the container can also delay everyone's cargo. ## Less-Than-Truckload (LTL) URL: https://fulfillment.wiki/glossary/less-than-truckload/ Category: Freight & Retail Compliance Less-Than-Truckload (LTL) is freight shipping for loads too large for parcel but not large enough to fill a truck, where several shippers share trailer space. Why it matters: Used for inbound replenishment, wholesale orders, and inter-warehouse transfers. Priced by freight class, weight, and lane. Q: When should I ship LTL instead of parcel or full truckload? A: LTL usually fits shipments from about 1 to 6 pallets, or roughly 150 to 15,000 pounds, that are too heavy for parcel but too small to fill a trailer. Above that range, compare volume LTL quotes against partial or full truckload. ## Liftgate Service URL: https://fulfillment.wiki/glossary/liftgate-service/ Category: Freight & Retail Compliance Liftgate Service is an accessorial service in which the carrier uses a truck-mounted hydraulic platform to lower freight from the trailer to the ground at a location without a loading dock. Why it matters: Many small warehouses, retail stores, and offices have no dock, so LTL deliveries there need a liftgate. If it is not on the bill of lading, the carrier adds the fee after the fact or the delivery fails and must be rescheduled. Q: When do I need to request liftgate service for an LTL shipment? A: Request it whenever the pickup or delivery site has no loading dock or forklift and the pallet must come down to ground level. Add it when you book and on the bill of lading so it is quoted up front rather than billed later. ## Lines per Order URL: https://fulfillment.wiki/glossary/lines-per-order/ Category: Metrics & Unit Economics Lines per Order is the average number of distinct SKUs, or order lines, in each customer order, regardless of the quantity ordered on each line. Why it matters: Each line usually means a separate pick location, so lines per order predicts pick labor better than units. 3PLs often price additional picks per line or per item. Formula: Lines per order = total order lines ÷ total orders. Example: Total order lines 18,000 lines, Total orders 12,000 orders: Lines per order = 1.50. Q: Why do lines per order matter more than units per order for picking? A: Picking 3 units of one SKU is a single trip to one location, while 3 different SKUs require three locations. Warehouse travel time and pick fees therefore track lines more closely than units. ## Liquidation URL: https://fulfillment.wiki/glossary/liquidation/ Category: Returns Liquidation is the bulk sale of returned, excess, or unsellable inventory to resellers or liquidators at a steep discount, typically by the pallet or truckload. Why it matters: Liquidation clears space and converts dead returns into some cash, but recovery is low and products may resurface at discounts on marketplaces. Many brands set brand-protection terms such as removing labels or limiting resale channels. Q: How much do you get for liquidating returns? A: Recovery varies widely by category, condition, and brand, and is usually a small fraction of retail value. Get bids from several liquidators and compare them with your refurbishment and recommerce options. ## Lithium Battery Shipping URL: https://fulfillment.wiki/glossary/lithium-battery-shipping/ Category: Parcel Shipping Lithium Battery Shipping is the shipment of lithium ion or lithium metal batteries, alone, packed with equipment, or installed in equipment, under dangerous goods rules that set packaging, labeling, and quantity limits. Why it matters: Electronics, e-bikes, and many personal care devices contain lithium batteries. Batteries shipped alone face the strictest rules, especially by air, while batteries installed in a device are the least restricted. Q: Can I ship lithium batteries by USPS? A: USPS accepts some lithium batteries when they are installed in or packed with the device they power, within size and quantity limits. Loose lithium batteries face tighter restrictions, so check the current USPS Publication 52 before shipping. ## Long-Term Storage Fee URL: https://fulfillment.wiki/glossary/long-term-storage-fee/ Category: Fulfillment & Warehousing Long-Term Storage Fee is an extra storage charge applied to inventory that has sat in a warehouse longer than a set period, used by 3PLs and marketplace fulfillment programs to discourage slow-moving stock. Why it matters: Long-term fees turn slow sellers into a real cost, so they push brands to liquidate, remove, or stop reordering aged inventory. Track inventory age by SKU to avoid them. Q: How do I avoid long-term storage fees? A: Monitor inventory age by SKU, send smaller and more frequent inbound shipments, and remove, liquidate, or discount aged units before they reach the fee threshold. Fee rules differ by provider, so check the exact age cutoffs. ## Lot Tracking URL: https://fulfillment.wiki/glossary/lot-tracking/ Category: Inventory Planning Lot Tracking is recording the production lot or batch number of each unit received and shipped so it can be traced later. Why it matters: Required for recalls and common for supplements, cosmetics, and food. It also supports FEFO rotation. Q: Which products need lot tracking? A: Lot tracking is standard for food, supplements, cosmetics, and other products with expiration dates or recall risk. Many retailers and marketplaces also require lot or expiration data for these categories. ## Lumper Fee URL: https://fulfillment.wiki/glossary/lumper-fee/ Category: Freight & Retail Compliance Lumper Fee is a charge for third-party labor that unloads a truck at the receiving facility, common at grocery and big-box retail distribution centers. Why it matters: Lumper fees are often paid by the driver on site and billed back to the shipper or broker as an accessorial. Retailer routing guides and freight quotes should state who pays so the cost does not surprise you on the invoice. Q: Who pays the lumper fee on a truckload delivery? A: It depends on the freight terms and the agreement, but the carrier often pays on site and bills it back to the shipper or broker. Confirm in your rate agreement and the retailer's routing guide whether lumper charges are reimbursed and what receipt is required. ## Master Carton URL: https://fulfillment.wiki/glossary/master-carton/ Category: Freight & Retail Compliance Master Carton is the outer shipping carton that holds a fixed number of units or inner packs of a single SKU as packed by the supplier, also called a case pack. Why it matters: Consistent master carton quantities and dimensions make receiving, storage, and retail replenishment faster. Retailers often require orders in multiples of the case pack and labels on each carton. Formula: Units per pallet = units per master carton × cartons per pallet. Example: Units per master carton 24 units, Cartons per pallet 40 cartons: Units per pallet = 960 units. Q: What is the difference between a master carton and an inner pack? A: The master carton is the outer shipping case that moves through freight and warehouses. An inner pack is a smaller grouping of units inside it, such as 4 boxes of 6 units in a master carton of 24. ## Merchandise Processing Fee (MPF) URL: https://fulfillment.wiki/glossary/merchandise-processing-fee/ Category: Import & Customs Merchandise Processing Fee (MPF) is a US Customs user fee on imports, charged on formal entries as a percentage of entered value subject to a minimum and maximum per entry, and as a flat fee on informal entries. Why it matters: MPF appears on every formal entry and belongs in landed cost. Because of the per-entry cap, consolidating shipments into fewer, larger entries can lower MPF per unit. Formula: MPF = entered value × MPF rate, then raised to the minimum or capped at the maximum. Check current CBP rates. Example: Entered value $50,000, MPF rate 0.3464%, Minimum fee $33.58, Maximum fee $651.50: MPF = $173.20. Q: How is the merchandise processing fee calculated? A: For formal entries, MPF is a fixed percentage of the entered value, with a minimum and maximum per entry that CBP adjusts each fiscal year. Check CBP's current figures before costing a shipment. ## Micro-Fulfillment Center (MFC) URL: https://fulfillment.wiki/glossary/micro-fulfillment-center/ Category: Fulfillment & Warehousing Micro-Fulfillment Center (MFC) is a small, often highly automated fulfillment site located inside or near a dense metro area to enable fast local delivery. Why it matters: MFCs shorten last-mile distance, which lowers parcel zones and makes same-day delivery possible without paying for premium air services. Q: What is a micro-fulfillment center used for? A: It stores a limited set of fast-moving items close to customers to support same-day or next-day delivery and store pickup. Grocery and quick commerce were early users. ## Middle Mile URL: https://fulfillment.wiki/glossary/middle-mile/ Category: Freight & Retail Compliance Middle Mile is the movement of goods between facilities, such as from a port or DC to a fulfillment center, before final delivery. Why it matters: Includes inventory transfers between warehouses in a distributed network, usually by LTL or truckload. Q: What is the difference between middle mile and last mile? A: Middle mile moves inventory in bulk between facilities, such as from a port or DC to a fulfillment center, usually by truckload or LTL. Last mile delivers individual orders from the final facility or carrier hub to the customer. ## Min/Max Inventory URL: https://fulfillment.wiki/glossary/min-max-inventory/ Category: Inventory Planning Min/Max Inventory is a replenishment method in which each SKU has a minimum level that triggers an order and a maximum level that the order quantity brings inventory back up to. Why it matters: It is simple enough to run in a spreadsheet or WMS and works well for stable SKUs. It reacts poorly to seasonality unless min and max are updated regularly. Formula: Order quantity = max − current inventory position (on-hand + on order − allocated). Example: Max level 1,200 units, On hand 350 units, On order 0 units, Allocated 50 units: Inventory position = 300 units; Order quantity = 900 units. Q: How do you set min and max inventory levels? A: A common approach sets the minimum at the reorder point, which is expected demand during lead time plus safety stock, and the maximum at the minimum plus a typical order quantity. Review both when demand or lead times change. ## Minimum Order Quantity (MOQ) URL: https://fulfillment.wiki/glossary/minimum-order-quantity/ Category: Inventory Planning Minimum Order Quantity (MOQ) is the smallest quantity a supplier will accept in a single purchase order. Why it matters: High MOQs force small brands to hold more inventory than demand justifies, raising storage cost and dead stock risk. Q: Can you negotiate a supplier's minimum order quantity? A: Often yes. Common approaches are accepting a higher unit price, combining colors or sizes to meet the minimum, committing to a larger annual volume split across several orders, or paying a setup fee. ## Monthly Minimum URL: https://fulfillment.wiki/glossary/monthly-minimum/ Category: Fulfillment & Warehousing Monthly Minimum is a minimum amount a 3PL bills each month regardless of actual activity, charged as a top-up when a brand's fulfillment and storage fees fall below that threshold. Why it matters: Minimums can make a low-volume or seasonal brand's effective cost per order much higher than quoted. Ask about minimums, ramp-up periods, and how they are calculated before signing. Q: What happens if I don't meet my 3PL's monthly minimum? A: The 3PL typically bills the difference between your actual fees and the minimum. Some offer a reduced minimum during the first months or during slow seasons, so it is worth negotiating. ## Multi-Carrier Shipping Software URL: https://fulfillment.wiki/glossary/multi-carrier-shipping-software/ Category: Systems & Automation Multi-Carrier Shipping Software is software that connects to several parcel carriers so a shipper can compare rates, buy labels, print documents, and track packages from one interface. Why it matters: It lets brands without a full WMS rate shop, apply shipping rules, and avoid being locked into one carrier. Many 3PLs and WMS platforms include similar functions. Q: What does multi-carrier shipping software do? A: It imports orders, compares rates across connected carriers, buys and prints labels, and sends tracking numbers back to the sales channel. Some also apply automation rules for box selection and service choice. ## Multi-Channel Fulfillment (MCF) URL: https://fulfillment.wiki/glossary/multi-channel-fulfillment/ Category: Fulfillment & Warehousing Multi-Channel Fulfillment (MCF) is using one inventory pool to fulfill orders from several sales channels. Amazon's MCF service ships non-Amazon orders from FBA inventory. Why it matters: Simplifies inventory but can expose DTC orders to marketplace packaging and fees. Q: What is the benefit of multi-channel fulfillment? A: One shared inventory pool serves several channels, reducing total stock needed and the risk of one channel running out while another holds excess. It requires reliable inventory sync. ## Must Arrive By Date (MABD) URL: https://fulfillment.wiki/glossary/must-arrive-by-date/ Category: Freight & Retail Compliance Must Arrive By Date (MABD) is the date on a retail purchase order by which the shipment must arrive at the retailer's distribution center, used to measure on-time delivery. Why it matters: Retailers such as Walmart measure vendor on-time performance against MABD, and missing it can trigger fines. Plan ship dates backward from the MABD using actual transit and appointment lead times. Q: What is the difference between MABD and ship date? A: The ship date is when freight leaves your facility, while MABD is when it must be at the retailer's DC. Retailers judge on-time performance against arrival, so you must ship early enough to cover transit and any appointment wait. ## National Motor Freight Classification (NMFC) URL: https://fulfillment.wiki/glossary/national-motor-freight-classification/ Category: Freight & Retail Compliance National Motor Freight Classification (NMFC) is the industry standard, maintained by the National Motor Freight Traffic Association (NMFTA), that assigns commodities an item number and a freight class used to price LTL shipments. Why it matters: LTL carriers price from the NMFC class, so an incorrect item or class on the bill of lading leads to reclassification fees. Docket 2025-1, effective July 19, 2025, moved most commodities to a 13-tier density scale. Q: How did NMFC classification change in 2025? A: Docket 2025-1, effective July 19, 2025, reclassified most commodities by density using a 13-tier scale instead of commodity-specific class rules. Shippers should re-measure freight and confirm item numbers, because classes for many products changed. ## Negotiated Rates URL: https://fulfillment.wiki/glossary/negotiated-rates/ Category: Parcel Shipping Negotiated Rates is discounted parcel prices agreed in a contract between a shipper and a carrier, typically as percentage discounts off published rates plus reduced or waived surcharges and minimums. Why it matters: Headline base-rate discounts matter less than surcharge terms, DIM divisors, and minimum charges. Contracts are usually renegotiated when volume, service mix, or carrier strategy changes. Q: How do I negotiate better UPS or FedEx rates? A: Share accurate shipment data by zone, weight, and service, and negotiate surcharges, DIM divisor, and minimum charges, not just base discounts. Credible alternatives such as other carriers strengthen your position. ## Ocean Bill of Lading URL: https://fulfillment.wiki/glossary/ocean-bill-of-lading/ Category: Import & Customs Ocean Bill of Lading is the document an ocean carrier or NVOCC issues for sea cargo that serves as a receipt for the goods, evidence of the contract of carriage, and, when negotiable, a document of title. Why it matters: Under an original bill of lading, the consignee typically must surrender it, or the carrier must issue a telex release, before cargo is released. Delays in releasing originals can create demurrage at the destination port. Q: What is a telex release? A: A telex release is when the shipper surrenders the original bill of lading at origin and the carrier electronically authorizes release at destination, so no paper originals need to travel. It avoids delays from couriering originals. ## On-Hand Inventory URL: https://fulfillment.wiki/glossary/on-hand-inventory/ Category: Inventory Planning On-Hand Inventory is the total quantity of a SKU physically present in a warehouse or store, including units allocated to orders, on quality hold, or damaged. Why it matters: On-hand drives storage cost and inventory valuation, but it overstates what you can sell. Track on-hand and available as separate numbers. Q: Why does my 3PL's on-hand count differ from my store's available quantity? A: On-hand includes units allocated to unshipped orders, on hold, or damaged, while the storefront usually shows only sellable units. Timing gaps in inventory syncs and unreceived inbound shipments also cause differences. ## On-Time Delivery (OTD) URL: https://fulfillment.wiki/glossary/on-time-delivery/ Category: Metrics & Unit Economics On-Time Delivery (OTD) is the percentage of orders delivered by the date promised to the customer. Why it matters: Separate warehouse delays from carrier delays to see who missed the promise. Formula: OTD = orders delivered on or before promised date ÷ orders delivered × 100. Example: Delivered on or before the promised date 9,600 orders, Orders delivered 10,000 orders: On-time delivery = 96.0%. Q: What is the difference between on-time delivery and on-time shipping? A: On-time shipping measures whether the warehouse handed the order to the carrier by the deadline. On-time delivery measures whether the customer received it by the promised date, so it includes carrier transit performance. ## On-Time In-Full (OTIF) URL: https://fulfillment.wiki/glossary/on-time-in-full/ Category: Freight & Retail Compliance On-Time In-Full (OTIF) is a retail supplier performance metric measuring the share of purchase orders or cases delivered within the required delivery window and in the full ordered quantity. Why it matters: Major US retailers track OTIF and may fine suppliers that fall below their targets, sometimes as a percentage of the cost of noncompliant goods. Program targets and penalties change, so check each retailer's current supplier requirements. Formula: OTIF % = (orders on time AND in full) ÷ total orders × 100. Example: Orders on time and in full 188 orders, Total orders 200 orders: OTIF = 94.0%. Q: How is OTIF calculated? A: OTIF is the number of orders or cases that arrived both within the delivery window and with the full ordered quantity, divided by the total. Each retailer defines the window and whether it measures by order, line, or case. ## Open-to-Buy (OTB) URL: https://fulfillment.wiki/glossary/open-to-buy/ Category: Inventory Planning Open-to-Buy (OTB) is a budget for how much new inventory can still be purchased in a period without exceeding the planned ending inventory, after accounting for planned sales, markdowns, and stock already on order. Why it matters: It ties purchasing to a cash plan so buyers do not overcommit to inventory before sales justify it. Formula: OTB = planned sales + planned markdowns + planned ending inventory − beginning inventory − inventory on order. Example: Planned sales $200,000, Planned markdowns $10,000, Planned ending inventory $150,000, Beginning inventory $180,000, Inventory on order $60,000: Open to buy = $120,000. Q: How do you calculate open-to-buy? A: Add planned sales, planned markdowns, and planned end-of-period inventory, then subtract beginning-of-period inventory and anything already on order. The result is the amount you can still buy for that period. ## Order Accuracy URL: https://fulfillment.wiki/glossary/order-accuracy/ Category: Metrics & Unit Economics Order Accuracy is the percentage of orders shipped with the correct items and quantities. Why it matters: Each mis-ship costs a reshipment, a return, and customer trust. Top 3PLs commit to 99.5% or higher. Formula: Order accuracy = orders shipped without error ÷ total orders shipped × 100. Example: Orders shipped without error 9,950 orders, Total orders shipped 10,000 orders: Order accuracy = 99.5%. Q: What counts as an inaccurate order? A: Any order shipped with the wrong item, wrong variant such as size or color, wrong quantity, or a missing item. Many brands also count wrong addresses entered by the warehouse, but not customer address errors. ## Order Management System (OMS) URL: https://fulfillment.wiki/glossary/order-management-system/ Category: Systems & Automation Order Management System (OMS) is software that collects orders from all channels, applies routing rules, and sends each order to the right warehouse or store. Why it matters: Needed once a brand runs multiple warehouses or channels and must decide where each order ships from. Q: What is the difference between an OMS and a WMS? A: An OMS manages orders across sales channels and decides where each should ship from. A WMS runs operations inside the warehouse, such as receiving, storage, picking, and packing. ## Over, Short, and Damaged (OS&D) URL: https://fulfillment.wiki/glossary/over-short-and-damaged/ Category: Freight & Retail Compliance Over, Short, and Damaged (OS&D) is the category of delivery exceptions in which received freight exceeds, falls below, or arrives in worse condition than what the bill of lading lists, also used for the carrier department handling them. Why it matters: Any OS&D must be noted on the delivery receipt before signing, or a later claim becomes much harder to win. Receiving teams should count pieces and inspect packaging while the driver is still present. Q: What should my warehouse do if an LTL delivery arrives short or damaged? A: Write the specific exception on the delivery receipt, such as "2 cartons short" or "1 pallet crushed," before signing, and photograph the freight. Then notify the carrier and file a freight claim with supporting documents. ## Oversize Package URL: https://fulfillment.wiki/glossary/oversize-package/ Category: Parcel Shipping Oversize Package is a parcel whose length or combined length and girth exceeds a carrier's standard size limits, triggering large package surcharges and minimum billable weights. Why it matters: UPS and FedEx generally treat a package as large when its length exceeds 96 inches or length plus girth exceeds 130 inches, and they cap parcels at 165 inches length plus girth and 150 pounds. Bulky products such as furniture often move to LTL or white glove services past those limits. Formula: Length + girth = L + 2W + 2H. Example: Length (longest side) 60 in, Width 20 in, Height 15 in: Length + girth = 130 inches. Q: How do you calculate length plus girth? A: Measure the longest side as length, then add twice the width and twice the height. The total is compared with the carrier's size limits. ## Overstock URL: https://fulfillment.wiki/glossary/overstock/ Category: Inventory Planning Overstock is inventory held in excess of what forecast demand requires over the planning horizon, often measured as units beyond a target number of days or weeks of supply. Why it matters: Overstock ties up cash, raises storage and aged-inventory fees, and often ends in markdowns. It is usually caused by over-forecasting, large MOQs, or a cancelled promotion. Q: How do you get rid of overstock in ecommerce? A: Common options are bundling with fast sellers, targeted discounts, selling through outlet or off-price channels, liquidation, and donation. Act before the stock ages into long-term storage fees or becomes obsolete. ## Packing List URL: https://fulfillment.wiki/glossary/packing-list/ Category: Import & Customs Packing List is a shipping document that itemizes the contents of each carton or pallet in a shipment, including quantities, weights, dimensions, and marks, without stating prices. Why it matters: Customs brokers, forwarders, and receiving warehouses all use the packing list. An accurate one speeds customs exams and lets your 3PL check in cartons against the ASN. Q: What is the difference between a commercial invoice and a packing list? A: The commercial invoice states what the goods are and what they cost, for customs valuation. The packing list states how they are packed, carton by carton, with weights and dimensions, for handling, exams, and receiving. ## Packing Slip URL: https://fulfillment.wiki/glossary/packing-slip/ Category: Fulfillment & Warehousing Packing Slip is a document placed inside a shipment that lists the items, quantities, and order number in the package, usually without prices, so the recipient can check the contents. Why it matters: The packing slip is often the only printed piece a DTC customer receives, so many brands use it for return instructions and branding. Wrong or missing slips also slow down returns and wholesale receiving. Q: What is the difference between a packing slip and an invoice? A: A packing slip lists what is in the box and is used to check contents, while an invoice requests or records payment and shows prices. Many ecommerce brands print slips without prices, especially for gift orders. ## Pallet URL: https://fulfillment.wiki/glossary/pallet/ Category: Freight & Retail Compliance Pallet is a flat transport platform, typically 48 × 40 inches in the US, on which goods are stacked for handling by forklift. Why it matters: Pallet configuration (height, stacking, overhang) affects freight class, storage fees, and retailer compliance. Q: What size is a standard pallet in the US? A: The most common US pallet is the GMA-style 48 × 40 inch wooden pallet. Retailers and 3PLs often also set maximum loaded height and weight, so check their routing guide or receiving requirements. ## Pallet Position URL: https://fulfillment.wiki/glossary/pallet-positions/ Category: Fulfillment & Warehousing Pallet Position is one storage location in racking sized to hold a pallet; a common unit for pricing warehouse storage. Why it matters: Half-empty pallets cost the same as full ones, so consolidating partial pallets lowers storage bills. Q: How do 3PLs charge for pallet storage? A: Many charge a monthly fee per pallet position used, though some bill per bin, per shelf, or per cubic foot. Ask how partial pallets and peak-season overflow are billed. ## Parcel Select URL: https://fulfillment.wiki/glossary/parcel-select/ Category: Parcel Shipping Parcel Select is a USPS destination-entry parcel service in which shippers or consolidators drop presorted packages at USPS facilities near the recipient in exchange for lower postage. Why it matters: Brands rarely buy it directly. It usually reaches them through a consolidator or 3PL that injects volume into USPS, which can lower the cost of lightweight residential parcels but may add transit time. Q: What is USPS Parcel Select used for? A: Parcel Select is used by high-volume shippers and consolidators to enter packages deep in the USPS network, close to the destination. USPS discounts the postage because it handles the package for a shorter distance. ## Peak Season URL: https://fulfillment.wiki/glossary/peak-season/ Category: Fulfillment & Warehousing Peak Season is the period of highest order volume, in US ecommerce roughly from late October through the end of December, centered on Black Friday and Cyber Monday. Why it matters: Plan inventory inbound deadlines, 3PL labor, carrier capacity, and surcharges months ahead. Q: When should brands prepare for peak season? A: Many brands plan inventory and send inbound stock to their 3PL weeks before Black Friday, since receiving backlogs, carrier surcharges, and capacity limits rise in Q4. ## Peak Surcharge URL: https://fulfillment.wiki/glossary/peak-surcharge/ Category: Parcel Shipping Peak Surcharge is a temporary fee carriers charge during high-volume periods, mainly from October through January. Why it matters: Can apply to large shippers based on volume above their baseline. Budget for it in Q4 unit economics. Q: When do carrier peak surcharges apply? A: Carriers usually apply peak surcharges during the holiday season from roughly October through January, and sometimes at other high-demand times. Dates and amounts are announced each year and can depend on your volume. ## Perfect Order Rate URL: https://fulfillment.wiki/glossary/perfect-order-rate/ Category: Metrics & Unit Economics Perfect Order Rate is the share of orders delivered on time, complete, undamaged, and with correct documentation. Why it matters: Combines several metrics, so it reflects what the customer actually experiences. Formula: Perfect order rate = % on time × % complete × % damage-free × % correct documentation. Example: On time 98%, Complete 99%, Damage-free 99%, Correct documentation 99%: Perfect order rate = 95.1%. Q: Why is perfect order rate lower than each individual metric? A: Because an order must pass every check at once, the component rates multiply. For example, 98% on time, 99% complete, 99% damage-free, and 99% correct documentation combine to about 95% perfect orders. ## Periodic Inventory System URL: https://fulfillment.wiki/glossary/periodic-inventory-system/ Category: Inventory Planning Periodic Inventory System is a method of tracking inventory in which quantities are determined by physical counts at set intervals, and cost of goods sold is calculated from those counts rather than recorded with each sale. Why it matters: Some small brands use periodic counting for accounting even when their storefront tracks units. It leaves no reliable stock figure between counts, which makes it unsuitable for multichannel selling. Q: What is the main drawback of a periodic inventory system? A: You do not know your true inventory or cost of goods sold between counts, so stockouts, shrinkage, and margin problems only show up at period end. ## Perpetual Inventory System URL: https://fulfillment.wiki/glossary/perpetual-inventory-system/ Category: Inventory Planning Perpetual Inventory System is a method of tracking inventory in which every receipt, sale, transfer, and adjustment updates quantities and values in real time, so records always show a current balance. Why it matters: Ecommerce depends on perpetual inventory to publish accurate stock levels to storefronts and marketplaces. It still needs cycle counts because records drift from physical reality. Q: Do I still need physical counts with a perpetual inventory system? A: Yes. Mis-picks, receiving errors, damage, and theft make records drift, so perpetual systems are verified with cycle counts or periodic full physical counts. ## Pick and Pack URL: https://fulfillment.wiki/glossary/pick-and-pack/ Category: Fulfillment & Warehousing Pick and Pack is the warehouse process of retrieving ordered items from storage (pick), then placing them in shipping cartons with packing material and a label (pack). Why it matters: Labor in pick and pack is the largest variable cost inside most fulfillment centers. Items per order and pick path length drive it. Q: How are pick and pack fees charged? A: 3PLs commonly charge a fee per order plus a fee for each additional item or pick, with packaging sometimes billed separately. Check how they define a pick, since some count per unit and others per SKU line. ## Pick Face URL: https://fulfillment.wiki/glossary/pick-face/ Category: Fulfillment & Warehousing Pick Face is the front, accessible storage location from which pickers take units for orders, such as a shelf bin or flow rack lane, as opposed to reserve or overstock storage. Why it matters: Fast movers should sit in pick faces close to packing to cut walking time. An empty pick face stops picking even when reserve stock exists, so replenishment must keep up. Q: What is the difference between a pick face and reserve storage? A: A pick face holds the units pickers take from directly, while reserve storage holds bulk backup stock, often on pallets in upper racking. Reserve stock is moved to the pick face during replenishment. ## Pick List URL: https://fulfillment.wiki/glossary/pick-list/ Category: Fulfillment & Warehousing Pick List is a list, printed or shown on a scanner, telling a picker which items, quantities, and storage locations to collect for one or more orders, usually sorted in walking order. Why it matters: A well-sequenced pick list shortens walking routes and reduces mispicks. Paper pick lists lack scan confirmation, so errors are often only caught at packing or by the customer. Q: What is the difference between a pick list and a packing slip? A: A pick list is an internal warehouse document that tells staff where to find items. A packing slip goes in the box and tells the recipient what was shipped. ## Pick-to-Light (PTL) URL: https://fulfillment.wiki/glossary/pick-to-light/ Category: Systems & Automation Pick-to-Light (PTL) is a system of lights mounted on storage locations that show pickers where to pick and how many units, confirmed by pressing a button. Why it matters: Raises speed and accuracy for high-volume SKUs and is often paired with put walls to sort batch-picked items into orders. Q: Does pick-to-light reduce picking errors? A: Yes, it usually improves accuracy and speed because lights show the exact location and quantity, and workers confirm each pick with a button. It works best for fast-moving SKUs in a fixed area. ## Pool Distribution URL: https://fulfillment.wiki/glossary/pool-distribution/ Category: Freight & Retail Compliance Pool Distribution is a distribution method in which many orders for one region are consolidated on a truckload to a local terminal, then broken down and delivered to individual destinations by local carriers. Why it matters: Pool distribution can cut cost and transit time compared with shipping many separate LTL orders to stores in the same region. It suits brands shipping to dozens of retail locations at once. Q: When does pool distribution make sense for a brand? A: It makes sense when you send many small shipments to stores or customers in the same metro area at the same time, such as a retail rollout. Consolidating to one truckload and breaking it locally often beats individual LTL rates and handling. ## Porch Piracy URL: https://fulfillment.wiki/glossary/porch-piracy/ Category: Parcel Shipping Porch Piracy is the theft of delivered packages from doorsteps, porches, or building lobbies after the carrier has marked them delivered. Why it matters: Stolen packages lead to reshipments, refunds, and chargebacks that the carrier will usually not cover once delivery is confirmed. Photo proof of delivery, signature rules for high-value orders, and pickup-point delivery reduce the exposure. Q: Who is responsible for a stolen package that was marked delivered? A: Carriers usually treat a package as delivered once it is scanned at the address, so the loss often falls on the merchant, the customer, or an insurer. Many brands set a written policy covering when they reship. ## Port of Entry URL: https://fulfillment.wiki/glossary/port-of-entry/ Category: Import & Customs Port of Entry is the designated US location, such as a seaport, airport, or land border crossing, where imported goods are formally entered and cleared through customs. Why it matters: The port of entry can differ from where the ship unloads if goods move inland in bond to clear closer to your warehouse. Choosing ports affects transit time, drayage cost, and congestion risk. Q: Can goods clear customs at an inland location instead of the arrival port? A: Yes. Goods can travel in bond from the port of arrival to an inland port of entry and clear customs there. This is common for rail moves to inland hubs such as Chicago or Dallas. ## Preorder URL: https://fulfillment.wiki/glossary/preorder/ Category: Inventory Planning Preorder is an order taken for a product before it is available, usually ahead of a launch. Why it matters: Useful for demand testing. The FTC Mail Order Rule requires sellers to ship within the stated time or notify buyers and offer a refund. Q: What is the difference between a preorder and a backorder? A: A preorder is for a product that has not yet been released or received for the first time. A backorder is for an existing product that is temporarily out of stock. ## Print-and-Apply URL: https://fulfillment.wiki/glossary/print-and-apply/ Category: Systems & Automation Print-and-Apply is equipment that prints a shipping or compliance label and applies it to a carton or parcel automatically, usually as the package moves along a conveyor. Why it matters: It removes a manual labeling step at high volume and reduces mislabeled parcels. Combined with a scale and dimensioner, it can rate and label packages without a person handling them. Q: When does print-and-apply labeling make sense? A: When a warehouse ships a high and steady volume of parcels or cartons along a conveyor line. At lower volumes, a person with a desktop label printer is usually more cost-effective. ## Priority Mail URL: https://fulfillment.wiki/glossary/priority-mail/ Category: Parcel Shipping Priority Mail is a USPS expedited parcel service with a 1 to 3 business day delivery standard for packages up to 70 pounds, priced by weight and zone, by flat rate, or by cubic tier. Why it matters: Brands use it for faster delivery promises without paying express air rates. Its flat rate and cubic options can be cheaper than ground pricing for small, dense items going to far zones. Q: Is Priority Mail faster than USPS Ground Advantage? A: Yes. Priority Mail has a 1 to 3 business day standard and Ground Advantage has a 2 to 5 business day standard. Both are delivery standards, not money-back guarantees. ## PRO Number URL: https://fulfillment.wiki/glossary/pro-number/ Category: Freight & Retail Compliance PRO Number is the tracking number an LTL carrier assigns to a shipment. Why it matters: Needed to track freight and file claims. Share it with the receiving warehouse to schedule appointments. Q: Where do I find the PRO number for an LTL shipment? A: The PRO number is usually on a barcode sticker the carrier applies to the bill of lading and freight at pickup, or it is assigned when you book online. Use it to track the shipment and to reference any invoice or claim. ## Proof of Delivery (POD) URL: https://fulfillment.wiki/glossary/proof-of-delivery/ Category: Parcel Shipping Proof of Delivery (POD) is a carrier record confirming that a package was delivered, typically showing the date, time, and location, and sometimes a photo, GPS point, or recipient signature. Why it matters: Proof of delivery is the main evidence when a customer says a package never arrived or files a payment chargeback. Photo or signature proof is much stronger than a delivered scan alone. Q: How do I get proof of delivery for a package? A: Look up the tracking number on the carrier's site or in your shipping platform, where most carriers offer a downloadable delivery record. Signature details are available only if a signature service was purchased. ## Purchase Order (PO) URL: https://fulfillment.wiki/glossary/purchase-order/ Category: Inventory Planning Purchase Order (PO) is a document a buyer issues to a supplier listing the SKUs, quantities, unit prices, delivery dates, and payment and shipping terms for an order of goods. Why it matters: The PO is the record your warehouse receives against and your finance team pays against. Clean POs make receiving, landed cost, and three-way matching possible. Q: Is a purchase order legally binding? A: A purchase order generally becomes a binding contract once the supplier accepts it, whether by signing, confirming in writing, or starting performance. Until then it is an offer the buyer can usually withdraw. ## Put-to-Light URL: https://fulfillment.wiki/glossary/put-to-light/ Category: Systems & Automation Put-to-Light is a system of lights on a wall or rack of cubbies, each assigned to an order, that shows a worker where to place each scanned item when sorting batch-picked units into orders. Why it matters: Put-to-light, often installed as a put wall, lets a warehouse batch pick many small orders and sort them quickly and accurately. It is a lower-cost step toward automation than a full sortation system. Q: What is the difference between pick-to-light and put-to-light? A: Pick-to-light shows a worker which storage location to pick from. Put-to-light shows a worker which order cubby to place an item into, usually after batch picking. ## Putaway URL: https://fulfillment.wiki/glossary/putaway/ Category: Fulfillment & Warehousing Putaway is moving received goods from the dock to their storage location and recording that location in the WMS. Why it matters: Until putaway is complete, inventory usually cannot be sold, so slow putaway causes avoidable stockouts. Q: What is the difference between receiving and putaway? A: Receiving is unloading and checking inbound goods against what was expected. Putaway is moving those goods to storage locations and recording where they are so they can be picked. ## Quality Control Inspection URL: https://fulfillment.wiki/glossary/quality-control-inspection/ Category: Fulfillment & Warehousing Quality Control Inspection is a check of products or orders against defined standards, done at receiving, before packing, or before shipping, to catch damage, defects, wrong items, or wrong quantities. Why it matters: Catching errors before shipping is far cheaper than paying for returns, reshipments, and lost customers. Brands can ask a 3PL for inbound inspections or order audits as a billed service. Q: Do 3PLs inspect inventory when it arrives? A: Most count cartons or units at receiving, but detailed inspection for defects or damage is usually a separate, billed service. Agree on what is checked and how discrepancies are reported during onboarding. ## Radio Frequency Identification (RFID) URL: https://fulfillment.wiki/glossary/radio-frequency-identification/ Category: Systems & Automation Radio Frequency Identification (RFID) is a technology that reads data from tags using radio waves, allowing many tagged items, cases, or pallets to be identified at once without a direct line of sight. Why it matters: Some large retailers require RFID tags on certain categories, such as apparel, from their suppliers. For brands, the tag cost per item must be weighed against faster counts and better inventory accuracy. Q: Is RFID better than barcodes for inventory? A: RFID can read many items at once without scanning each one, which speeds counts and receiving. Barcodes are cheaper per item and simpler, so most ecommerce warehouses still rely on them. ## Rate Shopping URL: https://fulfillment.wiki/glossary/rate-shopping/ Category: Systems & Automation Rate Shopping is automatically comparing carrier and service options for each shipment and selecting the cheapest that meets the delivery promise. Why it matters: A standard feature of shipping software. It works best when you have contracts with several national and regional carriers. Q: Is rate shopping always the cheapest option? A: It selects the lowest rate that meets set rules, but the cheapest label may not be the best total value if it is slower or less reliable. Most setups include delivery time and service rules, not just price. ## Receiving URL: https://fulfillment.wiki/glossary/receiving/ Category: Fulfillment & Warehousing Receiving is the warehouse process of unloading inbound shipments, checking them against the purchase order or ASN, and recording the inventory. Why it matters: Poorly labeled or unannounced shipments slow receiving and often trigger extra 3PL fees. Q: Why is my 3PL taking so long to receive inventory? A: Common causes are missing or inaccurate ASNs, unlabeled or mixed cartons, and peak season backlogs. Sending a clear ASN and following the 3PL's inbound labeling rules usually speeds up receiving. ## Recommerce URL: https://fulfillment.wiki/glossary/recommerce/ Category: Returns Recommerce is the resale of used, returned, or refurbished products, either through a brand's own resale channel or through marketplaces, instead of liquidating or discarding them. Why it matters: Recommerce turns returns and trade-ins into a second revenue stream and supports sustainability claims. It requires grading, photography, and listing processes separate from new inventory. Q: What is the difference between recommerce and liquidation? A: Recommerce sells items individually to end customers, often under the brand, and recovers more value. Liquidation sells items in bulk to resellers at a deep discount and recovers less, but clears inventory faster. ## Refrigerated Trailer (Reefer) URL: https://fulfillment.wiki/glossary/refrigerated-trailer/ Category: Freight & Retail Compliance Refrigerated Trailer (Reefer) is a temperature-controlled trailer or container with its own refrigeration unit, used to move perishable or temperature-sensitive goods such as food, supplements, cosmetics, and some pharmaceuticals. Why it matters: Reefer capacity costs more than dry van and tightens during produce seasons. Brands with heat-sensitive products such as chocolate or certain beauty items may need reefer moves in summer even if dry van works the rest of the year. Q: When should a DTC brand ship freight in a reefer instead of a dry van? A: Use a reefer when the product has a temperature range it must stay within, such as food, live cultures, or items that melt or separate in heat. Seasonal reefer use for summer heat protection is common for chocolate, candles, and some cosmetics. ## Refurbishment URL: https://fulfillment.wiki/glossary/refurbishment/ Category: Returns Refurbishment is the process of cleaning, repairing, testing, and repackaging a returned or used product so it can be resold, usually labeled as refurbished or renewed. Why it matters: Refurbishing recovers value from items that cannot be sold as new, especially electronics and durable goods. The labor and parts cost must stay below the price gap between refurbished and liquidation value. Q: Is refurbishing returns worth it? A: It is worth it when the refurbished resale price minus repair and handling cost beats what you would get from liquidation. For low-priced items, the labor often costs more than the recovery. ## Regional Carrier URL: https://fulfillment.wiki/glossary/regional-carrier/ Category: Parcel Shipping Regional Carrier is a parcel carrier that serves a specific part of the country, often with lower rates and fewer surcharges than national carriers. Why it matters: Adding regional carriers diversifies capacity during peak and gives leverage in national carrier negotiations. Q: Should I use a regional carrier? A: A regional carrier can offer lower rates and faster ground delivery within its coverage area. It works best when a large share of your orders ship to that region, with a national carrier covering the rest. ## Reorder Point (ROP) URL: https://fulfillment.wiki/glossary/reorder-point/ Category: Inventory Planning Reorder Point (ROP) is the inventory level at which a new purchase order should be placed so stock arrives before you run out. Why it matters: Setting reorder points per SKU and per warehouse prevents both stockouts and emergency air freight. Formula: Reorder point = (average daily sales × lead time in days) + safety stock. Example: Average daily sales 40 units/day, Lead time 60 days, Safety stock 800 units: Reorder point = 3,200 units. Q: How do you calculate a reorder point? A: Multiply average daily sales by lead time in days, then add safety stock. For example, 40 units a day with a 60-day lead time and 800 units of safety stock gives a reorder point of 3,200 units. ## Replenishment URL: https://fulfillment.wiki/glossary/replenishment/ Category: Inventory Planning Replenishment is the process of restoring inventory to target levels, either by ordering from suppliers or by moving stock from reserve storage or another warehouse into the locations where it sells or is picked. Why it matters: Late replenishment causes stockouts even when inventory exists elsewhere in the network. It is triggered by reorder points, min/max levels, or scheduled reviews. Q: What is the difference between supplier replenishment and warehouse replenishment? A: Supplier replenishment brings new stock into the business through purchase orders. Warehouse replenishment moves stock already on hand, for example from overstock pallets to forward pick locations, or from one fulfillment center to another. ## Residential Surcharge URL: https://fulfillment.wiki/glossary/residential-surcharge/ Category: Parcel Shipping Residential Surcharge is a carrier fee applied to deliveries to a home rather than a business address. Why it matters: Hits almost every DTC shipment, so it is a key negotiation point in carrier contracts. Q: Does USPS charge a residential surcharge? A: No. USPS does not add a residential surcharge to its parcel services, while UPS and FedEx do for deliveries to homes. This is one reason USPS is often cheaper for light DTC parcels. ## Restocking Fee URL: https://fulfillment.wiki/glossary/restocking-fee/ Category: Returns Restocking Fee is a charge deducted from a refund to cover the cost of processing a returned item. Why it matters: Can reduce returns but may lower conversion. State laws and marketplace policies may limit it. Q: Is it legal to charge a restocking fee? A: In most US states it is legal if the fee is clearly disclosed in the return policy before purchase. Some states have specific return policy disclosure rules, so check the states you sell into. ## Return Fraud URL: https://fulfillment.wiki/glossary/return-fraud/ Category: Returns Return Fraud is the abuse of a return policy to obtain money or goods dishonestly, such as returning stolen, used, or swapped items, claiming empty boxes, or returning items never bought. Why it matters: Return fraud raises refund costs and inventory losses that are hard to see without data. Rules on serial numbers, inspection before refund, and customer return history help catch it. Q: How do I prevent return fraud in ecommerce? A: Inspect items before refunding when possible, match serial numbers or tags, flag customers with unusual return patterns, and require photos for damage claims. Keep the policy clear so legitimate customers are not penalized. ## Return Grading URL: https://fulfillment.wiki/glossary/return-grading/ Category: Returns Return Grading is the inspection step that assigns a returned item a condition grade, such as new, like new, open box, damaged, or unsellable, which then determines its disposition. Why it matters: Consistent grading decides how much value you recover from returns. Clear grade definitions with photos help warehouse staff grade quickly and the same way every time. Q: How should I grade returned products? A: Use a short scale with written criteria and example photos, for example A for resellable as new, B for open box or minor wear, C for refurbish or repair, and D for liquidate or dispose. Record the grade in your WMS so disposition can follow automatically. ## Return Label URL: https://fulfillment.wiki/glossary/return-label/ Category: Returns Return Label is a shipping label used to send a product back to a brand or its warehouse, either included in the box, emailed on request, or generated through a returns portal. Why it matters: Many brands use pay-on-use labels, where postage is billed only if the label is scanned. Deciding who pays for return shipping is a major lever on return cost and return rate. Q: Should I include a return label in every package? A: It is convenient for customers, but it can raise return rates and you lose the chance to require a reason or offer an exchange first. Many brands instead issue labels on request through a returns portal. ## Return Merchandise Authorization (RMA) URL: https://fulfillment.wiki/glossary/return-merchandise-authorization/ Category: Returns Return Merchandise Authorization (RMA) is an approval number or record issued before a customer returns an item, used to track and process the return. Why it matters: Links each returned package to the original order so the warehouse knows what to expect and how to refund. Q: Do I need an RMA number for returns? A: An RMA number is not legally required, but it lets the warehouse match each incoming return to its order and approved reason. Most returns portals generate one automatically. ## Return Rate URL: https://fulfillment.wiki/glossary/return-rate/ Category: Metrics & Unit Economics Return Rate is the percentage of items or orders sold that customers send back. Why it matters: Varies widely by category; apparel often sees far higher rates than consumables. Track by SKU and reason code to fix root causes like sizing. Formula: Return rate = units returned ÷ units sold × 100. Example: Units returned 1,200 units, Units sold 10,000 units: Return rate = 12.0%. Q: Should return rate be measured by units or by orders? A: Units is more common because it ties to SKUs and reason codes, but order-level return rate shows how many customers had a problem. State which one you use and keep it consistent. ## Return Reason Code URL: https://fulfillment.wiki/glossary/return-reason-code/ Category: Returns Return Reason Code is a standardized code that records why a customer returned an item, such as wrong size, damaged, not as described, or changed mind, captured at return initiation or inspection. Why it matters: Reason codes turn returns into product, sizing, and listing feedback. They also decide who pays, since damage or wrong item returns usually come back at the brand's cost. Q: What return reasons should I track? A: Track a short fixed list such as size or fit, damaged, defective, wrong item sent, not as described, and no longer needed. Keep the list stable so trends are comparable over time, and allow a free-text comment. ## Return to Sender (RTS) URL: https://fulfillment.wiki/glossary/return-to-sender/ Category: Parcel Shipping Return to Sender (RTS) is a carrier status for a package that could not be delivered, because of a bad address, refusal, or unclaimed pickup, and is being sent back to the shipper. Why it matters: Return-to-sender packages cost outbound postage plus often a return charge, and the customer still has no product. Track the RTS rate by cause to fix address capture, refusals, or fraud patterns. Q: What does return to sender mean on tracking? A: It means the carrier could not deliver the package and is sending it back to the shipper's return address. Contact the customer to confirm the address and decide whether to reship or refund. ## Return to Vendor (RTV) URL: https://fulfillment.wiki/glossary/return-to-vendor/ Category: Returns Return to Vendor (RTV) is the process of sending defective, damaged, or excess inventory back to the supplier or manufacturer for credit, repair, or replacement under the purchase agreement. Why it matters: Without an RTV process, defective returns sit in the warehouse and their cost lands on the brand instead of the supplier. Agree on RTV terms, authorization steps, and deadlines in supplier contracts. Q: What does RTV mean in a warehouse? A: RTV means return to vendor. It refers to inventory set aside to send back to the supplier for credit or replacement, usually because it is defective or over-shipped. ## Return Window URL: https://fulfillment.wiki/glossary/return-window/ Category: Returns Return Window is the period after delivery or purchase during which a customer may return an item for a refund, exchange, or credit under the brand's return policy. Why it matters: Thirty days is a common US ecommerce window, and many retailers extend windows during the holiday season. Longer windows can lift conversion but bring back items that are harder to resell. Q: Does the return window start on purchase date or delivery date? A: It depends on the brand's policy. Starting on delivery date is fairer to customers and common in ecommerce, while some brands use the order date for simplicity. State it clearly in the policy. ## Returnless Refund URL: https://fulfillment.wiki/glossary/returnless-refund/ Category: Returns Returnless Refund is a refund or replacement issued without asking the customer to send the item back, used when return shipping and processing would cost more than the item can be recovered for. Why it matters: For low-value, bulky, or perishable items, keeping the return off the network can save money. It needs rules on value thresholds and customer history to limit abuse. Formula: Returnless refund saving = return label cost + processing cost − expected resale recovery. Offer a returnless refund when the saving is above zero. Example: Return label cost $9, Processing cost $4, Expected resale recovery $10: Saved by refunding without a return = $3.00. Q: When does a returnless refund make sense? A: It makes sense when the cost of return shipping and processing exceeds what you can recover by reselling, such as low-priced, heavy, or perishable items. Limit it by item value and customer history to prevent abuse. ## Returns Consolidation URL: https://fulfillment.wiki/glossary/returns-consolidation/ Category: Returns Returns Consolidation is the practice of collecting many individual returns at a drop-off point or hub and shipping them together in bulk to the brand or its warehouse instead of one parcel at a time. Why it matters: Consolidation lowers per-return shipping cost and packaging waste. The tradeoff is a slower physical return, so many brands refund at first scan rather than at receipt. Q: What are consolidated returns? A: Consolidated returns are individual customer returns combined into a larger shipment at a hub or drop-off location before going back to the brand. This reduces shipping cost per item but adds days before the item is received. ## Returns Portal URL: https://fulfillment.wiki/glossary/returns-portal/ Category: Returns Returns Portal is a self-service web page where customers start a return or exchange, choose a reason and return method, and receive a label or drop-off code without contacting support. Why it matters: A portal captures reason codes, enforces the return window, and offers exchanges before refunds. It also cuts support tickets and gives the warehouse advance notice of incoming returns. Q: Do I need a returns portal for my Shopify store? A: Not at low volume, since manual returns by email work. Once returns take meaningful support time, a portal helps by automating eligibility rules, labels, and refunds, and by collecting reason data. ## Reverse Logistics URL: https://fulfillment.wiki/glossary/reverse-logistics/ Category: Returns Reverse Logistics is everything involved in moving goods from customers back to the brand, including return shipping, inspection, restocking, refurbishing, recycling, and disposal. Why it matters: Returns can erase the margin on an order. Fast processing gets resalable items back into stock before they lose value. Q: What is included in reverse logistics? A: Reverse logistics covers everything that moves goods back from customers, including return shipping, receiving, inspection, restocking, repair, resale, recycling, and disposal. It also includes the data and refund steps that go with them. ## RF Scanner URL: https://fulfillment.wiki/glossary/rf-scanner/ Category: Systems & Automation RF Scanner is a handheld or wearable barcode scanner with a wireless connection to the warehouse system, used to confirm receiving, putaway, picks, and counts in real time; also called an RF gun. Why it matters: Scanning every move is the main way warehouses reach high order and inventory accuracy. A 3PL that still relies on paper for picking will usually have more mispicks. Q: What does RF stand for in a warehouse scanner? A: RF stands for radio frequency, referring to the wireless link the scanner uses to talk to the warehouse system. It is different from RFID, which reads tags by radio instead of scanning barcodes. ## Robotic Piece Picking URL: https://fulfillment.wiki/glossary/robotic-piece-picking/ Category: Systems & Automation Robotic Piece Picking is using a robotic arm with vision software and a suction or finger gripper to pick individual items from bins or totes, usually at a goods-to-person station. Why it matters: It targets each picking, the most labor-heavy fulfillment task, but reliability varies by product shape, packaging, and surface. Testing your actual SKUs is the best way to judge fit. Q: Can robots pick any product in a warehouse? A: Not yet. Robotic arms handle many boxed and bagged items well, but soft, shiny, transparent, very small, or irregular items can still be hard to grasp reliably. Most deployments keep people on hand for exceptions. ## Robots-as-a-Service (RaaS) URL: https://fulfillment.wiki/glossary/robots-as-a-service/ Category: Systems & Automation Robots-as-a-Service (RaaS) is a pricing model where a warehouse pays a recurring fee, often monthly or per unit handled, to use robots instead of buying them outright. Why it matters: RaaS lowers upfront cost and lets a warehouse add robots for peak and remove them after, which suits 3PLs and growing brands. Over a long period, total fees can exceed the purchase price. Q: Is it better to lease robots or buy them? A: Robots-as-a-service suits operations that want lower upfront cost, flexible capacity, or a trial period. Buying can cost less over a long, stable life, so compare total cost over the expected years of use. ## Routing Guide URL: https://fulfillment.wiki/glossary/routing-guide/ Category: Freight & Retail Compliance Routing Guide is a retailer's rulebook for how suppliers must label, pack, ship, and schedule deliveries to its warehouses. Why it matters: Each retailer's guide is different. Breaking its rules leads to chargebacks that come straight out of wholesale margin. Q: What happens if I do not follow a retailer's routing guide? A: Retailers usually issue chargebacks or fines for violations such as using an unapproved carrier, wrong labels, missing ASNs, or late arrival. Repeated violations can hurt your vendor scorecard and the retailer relationship. ## Safety Stock URL: https://fulfillment.wiki/glossary/safety-stock/ Category: Inventory Planning Safety Stock is extra inventory held to cover variation in demand and supplier lead time. Why it matters: Too little causes stockouts; too much ties up cash and storage fees. Long ocean lead times from Asia usually require more safety stock. Formula: Safety stock = Z × σ(daily demand) × √(lead time in days). Z = 1.65 targets about a 95% in-stock level. Example: Z (service factor) 1.65, Standard deviation of daily demand 12 units, Lead time 25 days: Safety stock = 99 units. Q: How much safety stock should an ecommerce brand hold? A: Enough to cover the gap between expected and worst-case demand and lead time at your target service level. A common formula multiplies a service-level factor by the standard deviation of demand over the lead time, so volatile SKUs with long lead times need more. ## Sales and Operations Planning (S&OP) URL: https://fulfillment.wiki/glossary/sales-and-operations-planning/ Category: Inventory Planning Sales and Operations Planning (S&OP) is a recurring cross-functional process, usually monthly, in which sales, marketing, operations, and finance agree on one demand plan and the supply, inventory, and budget needed to meet it. Why it matters: It stops marketing from launching promotions that operations cannot stock and keeps purchasing aligned with the cash plan. Q: What happens in an S&OP meeting? A: The team reviews last month's forecast versus actual sales, updates the demand plan for upcoming promotions and launches, checks whether supply and warehouse capacity can meet it, and agrees on decisions such as extra purchase orders or markdowns. ## Same-Day Fulfillment URL: https://fulfillment.wiki/glossary/same-day-fulfillment/ Category: Fulfillment & Warehousing Same-Day Fulfillment is picking, packing, and handing an order to a carrier on the same business day it is received, provided the order arrives before the warehouse's cutoff time. Why it matters: Same-day shipping is a common 3PL SLA and a basis for faster delivery promises. It differs from same-day delivery, where the customer receives the order on the day it was placed. Q: Is same-day fulfillment the same as same-day delivery? A: No. Same-day fulfillment means the order ships the same day it is placed, while same-day delivery means it arrives the same day. Same-day delivery usually requires local inventory and a local courier. ## Seasonality URL: https://fulfillment.wiki/glossary/seasonality/ Category: Inventory Planning Seasonality is a predictable pattern in which demand rises or falls at the same times each year, driven by holidays, weather, school calendars, or shopping events. Why it matters: Most US ecommerce brands do a large share of annual sales in Q4. Seasonal SKUs need purchase orders placed months ahead and a plan for what is left after the season. Q: How do you account for seasonality in inventory planning? A: Build forecasts from the same period in prior years, adjusted for growth, rather than recent weeks alone. Then work back from the peak by your full lead time, including production, ocean transit, and receiving, to set purchase order dates. ## Section 301 Tariffs URL: https://fulfillment.wiki/glossary/section-301-tariffs/ Category: Import & Customs Section 301 Tariffs is additional US duties imposed under Section 301 of the Trade Act of 1974 in response to a trading partner's unfair practices, most widely on many goods of Chinese origin since 2018. Why it matters: Section 301 duties stack on top of normal HTS duty rates and apply by origin, so they can greatly raise landed cost for Chinese-made products. Rates, covered lists, and exclusions have changed repeatedly; check current USTR and CBP guidance. Q: How do I know if Section 301 tariffs apply to my product? A: Check whether your product's HTS code is on a Section 301 list and whether it is of a covered origin, such as China. Your customs broker can confirm the Chapter 99 number that applies and whether any exclusion is in effect. ## Sell-Through Rate URL: https://fulfillment.wiki/glossary/sell-through-rate/ Category: Metrics & Unit Economics Sell-Through Rate is the share of received inventory that sold during a period. Why it matters: A quick way to judge a launch or a seasonal buy and decide whether to reorder or mark down. Formula: Sell-through rate = units sold ÷ units received × 100. Example: Units sold 750 units, Units received 1,000 units: Sell-through rate = 75.0%. Q: What is a good sell-through rate? A: It depends on the time frame and product type. Compare sell-through for a season or launch against your plan, and use low sell-through as an early signal to slow reorders or start markdowns. ## Serial Shipping Container Code (SSCC) URL: https://fulfillment.wiki/glossary/serial-shipping-container-code/ Category: Freight & Retail Compliance Serial Shipping Container Code (SSCC) is an 18-digit GS1 number that uniquely identifies a carton or pallet, printed on a GS1-128 label. Why it matters: Retailers match the SSCC on each carton to the EDI 856 ASN. Missing or wrong labels are a top cause of retail chargebacks. Q: How do I get SSCC numbers for my cartons? A: License a GS1 company prefix from GS1 US, then generate SSCCs by combining an extension digit, your prefix, a unique serial reference, and a check digit. Many WMS, EDI, and labeling tools generate them automatically once your prefix is set up. ## Serialization URL: https://fulfillment.wiki/glossary/serialization/ Category: Inventory Planning Serialization is the practice of assigning a unique serial number to each individual unit of a product and recording it at receiving, shipment, and return. Why it matters: Serial tracking supports warranty claims, theft and fraud checks on returns, and recalls for electronics and other high-value goods. It adds a scan step per unit, which raises fulfillment cost. Q: What is the difference between serial tracking and lot tracking? A: Lot tracking groups units made in the same batch under one lot number, which is enough for most recalls and expiration control. Serial tracking identifies every individual unit, which is needed for warranties, high-value items, and some regulated products. ## Service Level Agreement (SLA) URL: https://fulfillment.wiki/glossary/service-level-agreement/ Category: Fulfillment & Warehousing Service Level Agreement (SLA) is contracted performance targets between a brand and a logistics provider, such as same-day ship rate, order accuracy, and dock-to-stock time, often with penalties for misses. Why it matters: Read how each SLA is measured. A 99.5% accuracy SLA measured on audited samples is weaker than one measured on customer-reported errors. Q: What should a 3PL SLA include? A: Common terms include order ship time after cutoff, receiving time, order accuracy, inventory accuracy, and how failures are credited or remedied. Clear definitions matter as much as the targets. ## Ship-from-Store (SFS) URL: https://fulfillment.wiki/glossary/ship-from-store/ Category: Fulfillment & Warehousing Ship-from-Store (SFS) is fulfilling online orders using inventory in physical retail stores. Why it matters: Turns stores into local fulfillment nodes and sells inventory that would otherwise be marked down. Q: What are the challenges of ship-from-store? A: Store inventory accuracy is often lower than in warehouses, staff must balance shoppers and online orders, and stores may lack packing space and carrier pickups. ## Ship-on-Time Rate URL: https://fulfillment.wiki/glossary/ship-on-time-rate/ Category: Metrics & Unit Economics Ship-on-Time Rate is the percentage of orders shipped by their required ship date or within the agreed handling time, measured at carrier handoff. Why it matters: It is the most common fulfillment SLA in 3PL contracts. Marketplaces also track the inverse; Amazon, for example, measures a late shipment rate for seller-fulfilled orders. Formula: Ship-on-time rate = orders shipped by required ship date ÷ orders due to ship × 100. Example: Shipped by the required ship date 4,920 orders, Orders due to ship 5,000 orders: Ship-on-time rate = 98.4%. Q: What is the difference between ship-on-time rate and on-time delivery? A: Ship-on-time rate measures whether the warehouse handed the package to the carrier by the deadline. On-time delivery measures whether the customer received it by the promised date, which also depends on carrier performance. ## Shipper Load and Count (SLAC) URL: https://fulfillment.wiki/glossary/shipper-load-and-count/ Category: Freight & Retail Compliance Shipper Load and Count (SLAC) is a bill of lading notation stating that the shipper loaded and counted the freight without the driver verifying the quantity, typically used on sealed truckloads and containers. Why it matters: SLAC shifts the burden of proving shortages to the shipper, so a short count at delivery is hard to claim against the carrier if the seal was intact. Keep load photos, seal numbers, and loading records. Q: What does SLAC mean on a bill of lading? A: It means the shipper loaded and counted the goods and the driver did not verify the piece count. If the trailer arrives with the original seal intact and the count is short, the carrier is usually not liable for the shortage. ## Shipping Cost as Percent of Revenue URL: https://fulfillment.wiki/glossary/shipping-cost-as-percent-of-revenue/ Category: Metrics & Unit Economics Shipping Cost as Percent of Revenue is the share of net revenue spent on outbound postage to customers, before or after subtracting shipping fees collected from customers. Why it matters: Free shipping offers, carrier rate increases, and lower order values all show up here first. Report both gross and net of shipping revenue so the trade-off is visible. Formula: Net shipping cost % = (outbound postage − shipping fees collected) ÷ net revenue × 100. Example: Outbound postage $60,000, Shipping fees collected from customers $15,000, Net revenue $500,000: Net shipping cost = 9.0%. Q: How do I calculate net shipping cost as a percent of revenue? A: Subtract the shipping fees customers paid from your total outbound postage, then divide by net product revenue. This shows how much of your free or discounted shipping you are absorbing. ## Shipping Insurance URL: https://fulfillment.wiki/glossary/shipping-insurance/ Category: Parcel Shipping Shipping Insurance is coverage that reimburses a shipper for a package that is lost or damaged in transit, bought either as declared value from the carrier or as a policy from a third-party insurer. Why it matters: UPS and FedEx include limited liability by default, commonly up to $100 of declared value, and charge for coverage above that. Brands with high claim rates or valuable goods compare carrier declared value against third-party insurance and self-insuring. Q: Is declared value the same as shipping insurance? A: Not exactly. Declared value sets the carrier's maximum liability under its own terms, while shipping insurance is a policy, often from a third party, with its own claim rules. Both reimburse loss or damage, but terms and exclusions differ. ## Shipping Label URL: https://fulfillment.wiki/glossary/shipping-label/ Category: Parcel Shipping Shipping Label is a printed label carrying the carrier barcode, tracking number, service level, and addresses that a carrier scans to accept, route, and deliver a package. Why it matters: Labels are usually printed on 4x6 inch thermal stock from shipping software or a WMS. Postage is often charged when the label is created, so unused labels must be voided to get a refund. Q: Do I get charged for shipping labels I don't use? A: Usually yes, until you void them. Most carriers and shipping platforms charge postage when the label is created and refund it only after the label is voided within the allowed window. ## Shipping Manifest URL: https://fulfillment.wiki/glossary/shipping-manifest/ Category: Parcel Shipping Shipping Manifest is a document or electronic record listing every package handed to a carrier in one pickup or drop-off, used to confirm acceptance of the whole batch at once. Why it matters: Closing out a manifest each day, such as a USPS SCAN form, lets packages show as accepted even if some miss an individual acceptance scan. That cuts false 'not moving' tracking complaints. Q: What is a USPS SCAN form? A: A SCAN form (Shipment Confirmation Acceptance Notice) is a single barcode that represents all the labels in a shipment. When USPS scans it, every listed package is marked as accepted. ## Shipping Zone URL: https://fulfillment.wiki/glossary/shipping-zone/ Category: Parcel Shipping Shipping Zone is a carrier's measure of distance between the origin and destination ZIP codes. In the contiguous US, parcel zones run from 2 (closest) to 8 (farthest). Why it matters: Higher zones mean higher rates and slower ground transit. A single coast-to-coast warehouse ships many orders at zones 7 and 8. Q: How do I find the shipping zone between two ZIP codes? A: Use the carrier's zone chart or zone lookup tool, entering the origin ZIP code (usually the first three digits) and the destination. Shipping platforms also display the zone on each label. ## Shrinkage URL: https://fulfillment.wiki/glossary/shrinkage/ Category: Inventory Planning Shrinkage is inventory lost to theft, damage, miscounts, or administrative errors, measured as the gap between recorded and actual stock. Why it matters: 3PL contracts usually set an allowed shrinkage rate and the reimbursement value for losses above it. Q: What causes inventory shrinkage in ecommerce? A: Common causes are receiving errors, mis-picks, damage, theft, lost inbound shipments, and returns that were never restocked. Many of these are record errors rather than physical loss, which is why reconciliation matters. ## Signature Confirmation URL: https://fulfillment.wiki/glossary/signature-confirmation/ Category: Parcel Shipping Signature Confirmation is a paid carrier add-on that requires someone at the delivery address to sign for a package, with adult signature versions requiring the signer to be 21 or older. Why it matters: Brands add it to high-value orders to cut fraud and 'item not received' disputes, and adult signature is often required for alcohol and other age-restricted products. It also adds failed delivery attempts and cost, so most brands apply it by order value rule. Q: When should I require signature confirmation? A: Common triggers are orders above a set value, products with high resale value, addresses with past theft claims, and age-restricted goods that legally need an adult signature. Using it on every order raises cost and missed deliveries. ## SKU Rationalization URL: https://fulfillment.wiki/glossary/sku-rationalization/ Category: Inventory Planning SKU Rationalization is reviewing the product catalog and discontinuing SKUs that contribute little revenue or margin relative to their operating cost. Why it matters: Fewer SKUs means simpler forecasting, fewer storage locations, and faster picking. Q: How do you decide which SKUs to cut? A: Rank SKUs by sales, margin, and inventory investment, then review the bottom performers for strategic value, such as completing a size run or driving traffic. Cut those that add cost and complexity without adding profit or customer value. ## Slotting URL: https://fulfillment.wiki/glossary/slotting/ Category: Fulfillment & Warehousing Slotting is deciding where each SKU is stored in the warehouse based on sales velocity, size, and which items sell together. Why it matters: Putting fast movers near pack stations and at waist height cuts pick time. Re-slotting before peak season is standard practice. Q: How often should a warehouse re-slot inventory? A: Many warehouses review slotting seasonally or whenever sales velocity shifts, such as before peak season or after launches. Fast movers should stay close to packing areas. ## Sortation System URL: https://fulfillment.wiki/glossary/sortation-system/ Category: Systems & Automation Sortation System is automated equipment that identifies items or parcels, usually by barcode scan, and diverts each one to the correct destination, such as an order, a packing station, or a carrier lane. Why it matters: Sortation lets high-volume warehouses batch pick and then separate orders, or sort packed parcels by carrier and service quickly. It is a large fixed investment, so it fits sites with steady high volume. Q: Do I need a sortation system in my warehouse? A: Usually only at high and steady volume, where manually sorting picks or parcels becomes a bottleneck. Smaller operations often get similar benefits from put walls or carrier-specific staging areas. ## Split Shipment URL: https://fulfillment.wiki/glossary/split-shipment/ Category: Fulfillment & Warehousing Split Shipment is an order shipped in more than one package or from more than one location. Why it matters: Each split adds a label and packaging cost. Good inventory placement keeps split rates low. Q: How can I reduce split shipments? A: Keep commonly co-ordered SKUs in the same warehouse, use order routing rules that prefer complete shipments, and hold safety stock of popular items in each location. ## Spot Rate URL: https://fulfillment.wiki/glossary/spot-rate/ Category: Freight & Retail Compliance Spot Rate is a one-time price quoted for a single shipment at current market conditions, as opposed to a rate locked in by contract for a set period. Why it matters: Spot rates swing with capacity, so they can be far cheaper or far more expensive than contract rates depending on the market. Brands with irregular or seasonal freight often buy spot; brands with steady lanes usually save by contracting. Q: Should I use spot rates or contract rates for truckload freight? A: Use contract rates for steady, predictable lanes where you want budget certainty and reliable capacity. Use spot rates for one-off or irregular moves, or when the spot market is clearly below your contracted rates. ## Stock Keeping Unit (SKU) URL: https://fulfillment.wiki/glossary/stock-keeping-unit/ Category: Inventory Planning Stock Keeping Unit (SKU) is a brand's internal code for one distinct sellable item, with a separate SKU for each variant such as size or color. Why it matters: SKU count drives warehouse complexity. Each SKU needs a storage location, barcode, and replenishment plan. Q: What is the difference between a SKU and a UPC? A: A SKU is an internal code a brand or retailer creates to track its own products and variants. A UPC is a standardized 12-digit barcode number licensed through GS1 that identifies the product across all retailers. ## Stockout URL: https://fulfillment.wiki/glossary/stockout/ Category: Inventory Planning Stockout is the state of having zero sellable inventory for a SKU. Why it matters: Stockouts lose sales and can hurt marketplace search ranking long after the item is back in stock. Q: How much do stockouts cost an ecommerce brand? A: Beyond lost sales, stockouts can push customers to competitors, waste ad spend driving traffic to unavailable products, and on marketplaces can lower a listing's ranking after it comes back in stock. ## Stockout Rate URL: https://fulfillment.wiki/glossary/stockout-rate/ Category: Metrics & Unit Economics Stockout Rate is the percentage of active SKUs, or SKU-days, with zero available inventory during a period, sometimes measured instead as the share of orders affected. Why it matters: Stockouts lose sales, and on marketplaces they can cost listing rank. Weighting by sales shows whether stockouts hit your best sellers or the long tail. Formula: Stockout rate = SKU-days out of stock ÷ total active SKU-days × 100. Example: Active SKUs 200 SKUs, Days in the period 30 days, SKU-days out of stock 270 SKU-days: Stockout rate = 4.5%. Q: How do you calculate stockout rate? A: A common method counts SKU-days: the number of days each active SKU had zero available stock, divided by total active SKU-days in the period. In-stock rate is 100% minus the stockout rate. ## Storage Utilization URL: https://fulfillment.wiki/glossary/storage-utilization/ Category: Metrics & Unit Economics Storage Utilization is the percentage of a warehouse's usable storage capacity that is currently occupied, measured by locations, pallet positions, or cubic volume. Why it matters: Very high utilization slows putaway and picking because staff must search for space. Many operators treat roughly 85% as practical full capacity, a commonly cited rule of thumb. Formula: Storage utilization = occupied locations ÷ total usable locations × 100. Example: Occupied locations 3,400 locations, Total usable locations 4,000 locations: Storage utilization = 85.0%. Q: Why is 100% storage utilization a problem? A: A full warehouse has no room to receive new inventory or reslot products, so receipts back up and labor time rises. Operators keep a buffer of open locations for inbound flow and peak season. ## Subscription Box Fulfillment URL: https://fulfillment.wiki/glossary/subscription-box-fulfillment/ Category: Fulfillment & Warehousing Subscription Box Fulfillment is fulfilling recurring orders that ship on a fixed schedule, often as large batches of identical or near-identical boxes assembled from several SKUs at once. Why it matters: Subscription shipments create sharp volume spikes on ship days, so the warehouse must plan labor, kitting, and inventory ahead. Late or incomplete boxes directly drive cancellations. Q: How do warehouses handle subscription box shipments? A: Most pre-build boxes as kits before the ship date, then process the orders as one large batch on a scheduled day. This requires inventory to arrive early and a forecast of subscriber count. ## Supply Chain Control Tower URL: https://fulfillment.wiki/glossary/supply-chain-control-tower/ Category: Systems & Automation Supply Chain Control Tower is a software dashboard that combines data from suppliers, forwarders, carriers, warehouses, and sales channels to show inventory and shipments end to end and flag exceptions. Why it matters: Brands with several 3PLs and import lanes use it to spot delays early and act before stockouts. Its value depends on clean, timely data from every partner. Q: What is supply chain visibility software? A: It is software that tracks orders, inventory, and shipments across partners in one place, often called a control tower. It alerts teams to delays or exceptions so they can respond earlier. ## Surcharge URL: https://fulfillment.wiki/glossary/surcharge/ Category: Parcel Shipping Surcharge is a fee added to the base parcel rate for specific conditions, such as residential delivery, delivery area, additional handling, large package, peak season, or fuel. Why it matters: Surcharges can add a large share to the base rate for DTC brands, since nearly all deliveries are residential. Q: Why is my shipping invoice higher than the label price? A: Carriers often add surcharges after shipment, such as address corrections, additional handling, or adjustments when the measured size or weight differs from what was entered. A carrier invoice audit shows which charges were added. ## Temperature-Controlled Storage URL: https://fulfillment.wiki/glossary/temperature-controlled-storage/ Category: Fulfillment & Warehousing Temperature-Controlled Storage is warehouse space kept within a set temperature range, such as refrigerated, frozen, or climate-controlled ambient storage, for products that spoil or degrade outside that range. Why it matters: Food, supplements, cosmetics, and some pharmaceuticals may need it, and fewer 3PLs offer it, so costs are higher. Shipments often also need insulated packaging and faster services, which raises cost per order. Q: Do supplements and cosmetics need temperature-controlled storage? A: Not always, but many do benefit from climate-controlled storage that avoids high heat and humidity, which can degrade ingredients or melt products. Check manufacturer storage requirements and ask the 3PL how it controls temperature in summer. ## Third-Party Logistics (3PL) URL: https://fulfillment.wiki/glossary/third-party-logistics/ Category: Fulfillment & Warehousing Third-Party Logistics (3PL) is a company that stores a brand's inventory and picks, packs, and ships its orders under contract, usually charging per order, per pick, and per unit of storage. Why it matters: Most US DTC brands outsource fulfillment to a 3PL once they pass a few hundred orders a day. The contract terms (minimums, storage units, receiving fees, SLAs) shape your cost per order more than the headline pick fee. Formula: Monthly 3PL invoice = receiving (per hour or per unit) + storage (per pallet, bin, or cubic foot per month) + pick and pack (per order + per additional item) + packaging + postage. Example: Units received 2,000 units, Receiving fee per unit $0.25, Pallets in storage 100 pallets, Storage per pallet per month $20, Orders shipped 3,000 orders, Pick and pack fee per order $3, Additional items picked 1,500 items, Fee per additional item $0.75, Packaging $1,500, Postage $24,000: Monthly 3PL invoice = $38,125.00; Invoice per order = $12.71. Q: When should an ecommerce brand switch to a 3PL? A: Many brands move to a 3PL when packing orders in-house takes too much time or space, or when they need faster shipping nationwide. Compare the 3PL's full cost per order, including storage, receiving, and minimums, with in-house costs. ## Throughput URL: https://fulfillment.wiki/glossary/throughput/ Category: Systems & Automation Throughput is the amount of work a warehouse, process, or machine completes in a period of time, such as orders shipped per day or units picked per hour. Why it matters: Throughput sets how many orders a site can handle during peak and whether cutoff times can be met. The slowest step, such as packing or loading, limits throughput for the whole operation. Formula: Throughput = Units completed / Time. Example: Units completed 4,800 units, Time 8 hours: Throughput = 600 units per hour. Q: How do you calculate warehouse throughput? A: Divide the units, orders, or lines completed by the time it took. For example, 4,800 units picked in an 8-hour shift equals 600 units per hour. ## Time in Transit URL: https://fulfillment.wiki/glossary/time-in-transit/ Category: Parcel Shipping Time in Transit is the number of business days a carrier takes to move a package from first scan to delivery, which depends on service level, origin, destination, and shipping zone. Why it matters: Time in transit, added to your order processing time, sets the delivery date you can promise. Ground services reach most of the US in 1 to 5 business days, while express services pay a premium for 1 or 2 days. Formula: Customer-facing delivery time = processing days + transit days. An order placed Monday after cutoff ships Tuesday; with 3 business days in transit it arrives Friday. Example: Processing time 1 business days, Time in transit 3 business days: Customer-facing delivery time = 4 business days. Q: What is the difference between transit time and delivery time? A: Transit time counts only the days the carrier has the package. Delivery time, as the customer sees it, also includes order processing and any wait for the next carrier pickup. ## Time to Ship URL: https://fulfillment.wiki/glossary/time-to-ship/ Category: Metrics & Unit Economics Time to Ship is the elapsed time between an order being placed or released to the warehouse and the package receiving its first carrier scan or ship confirmation. Why it matters: This is the portion of delivery speed your warehouse or 3PL controls. Measure to carrier pickup, not label creation, to catch packages that sit on the dock. Formula: Average time to ship = sum of (ship timestamp − order release timestamp) ÷ orders shipped. Example: Total hours from order release to ship, all orders 18,000 hours, Orders shipped 1,000 orders: Average time to ship = 18.0 hours. Q: Should time to ship be measured in business hours or calendar hours? A: Most 3PL SLAs use business days and order cutoff times, so measure that way for contract compliance. Track calendar hours as well, because customers experience weekends and holidays as part of the wait. ## Tracking Number URL: https://fulfillment.wiki/glossary/tracking-number/ Category: Parcel Shipping Tracking Number is a unique identifier a carrier assigns to a package that links every scan event, from acceptance to delivery, so shippers and recipients can follow its progress. Why it matters: Tracking data drives shipping confirmation emails, branded tracking pages, and fewer 'where is my order' tickets. Marketplaces such as Amazon also measure sellers on uploading valid tracking on time. Q: Why does my tracking say label created but the package is not moving? A: It means the label exists but the carrier has not scanned the package yet. Common causes are a missed pickup, a package left off the manifest, or a first scan that only happens later at a sorting facility. ## Transloading URL: https://fulfillment.wiki/glossary/transloading/ Category: Import & Customs Transloading is moving goods from an ocean container into a domestic 53-foot trailer, often near the port. Why it matters: Lets brands return the container quickly and split one import across several US warehouses. Q: Why would a brand transload ocean containers near the port? A: Transloading moves goods from international containers into 53-foot domestic trailers, which hold more cargo, so you need fewer trucks inland. It also returns the ocean container sooner, which can reduce detention, and lets you split freight between destinations. ## Transportation Management System (TMS) URL: https://fulfillment.wiki/glossary/transportation-management-system/ Category: Systems & Automation Transportation Management System (TMS) is software for planning, booking, tracking, and paying for freight shipments. Why it matters: Helps brands compare LTL and truckload quotes and audit freight invoices. Q: Does an ecommerce brand need a TMS? A: Brands shipping mainly small parcels often use shipping software instead. A TMS becomes useful when moving significant freight, such as LTL, full truckload, or wholesale shipments. ## Twenty-Foot Equivalent Unit (TEU) URL: https://fulfillment.wiki/glossary/twenty-foot-equivalent-unit/ Category: Import & Customs Twenty-Foot Equivalent Unit (TEU) is a standard measure of container capacity equal to one 20-foot container. A 40-foot container is 2 TEU. Why it matters: Ocean rates and port volumes are quoted in TEU or FEU (forty-foot equivalent). Q: How many TEUs is a 40-foot container? A: A 40-foot container equals 2 TEUs, and a 40-foot high cube also counts as 2 TEUs even though it has more height. TEU is a unit of capacity measurement, not a container type. ## Units per Hour (UPH) URL: https://fulfillment.wiki/glossary/units-per-hour/ Category: Metrics & Unit Economics Units per Hour (UPH) is a labor productivity measure equal to the number of units a worker or team processes in one labor hour for a task such as picking, packing, or receiving. Why it matters: UPH is the main input for staffing plans and for checking whether 3PL labor charges are reasonable. Compare it only within the same task and order profile. Formula: UPH = units processed ÷ labor hours worked. Example: Units processed 2,400 units, Labor hours worked 16 hours: UPH = 150 units per hour. Q: Is units per hour the same as picks per hour? A: Not exactly. Picks per hour counts trips to pick locations or pick lines, while units per hour counts individual items. If one pick often takes several units, UPH will be higher than picks per hour. ## Units per Order (UPO) URL: https://fulfillment.wiki/glossary/units-per-order/ Category: Metrics & Unit Economics Units per Order (UPO) is the average number of individual items in each customer order over a period, also called units per transaction. Why it matters: UPO drives packaging size, pick labor, and how much per-order costs like postage are spread across. Raising it lowers fulfillment cost per unit. Formula: Units per order = total units shipped ÷ total orders shipped. Example: Total units shipped 27,000 units, Total orders shipped 12,000 orders: Units per order = 2.25. Q: How do I increase units per order? A: Common tactics are bundles, multipacks, free-shipping thresholds set above the typical cart, and product recommendations at checkout. Check that added units do not push packages into a higher dimensional weight tier. ## Universal Product Code (UPC) URL: https://fulfillment.wiki/glossary/universal-product-code/ Category: Inventory Planning Universal Product Code (UPC) is a 12-digit barcode standard, issued through GS1, used to identify retail products in North America. It is one format of the broader GTIN. Why it matters: Amazon and most US retailers require valid GS1 barcodes. Warehouses scan UPCs to confirm the right item is picked. Q: Do I need a UPC to sell on Amazon? A: Amazon generally requires a GS1-issued product ID such as a UPC for most new listings, though brands enrolled in Brand Registry or certain categories can request an exemption. Codes bought from unofficial resellers may be rejected. ## USPS Ground Advantage URL: https://fulfillment.wiki/glossary/usps-ground-advantage/ Category: Parcel Shipping USPS Ground Advantage is a USPS ground parcel service for packages up to 70 pounds with a 2 to 5 business day delivery standard, launched in July 2023 to replace First-Class Package Service and Parcel Select Ground. Why it matters: It is the default economy service for many lightweight DTC orders. USPS delivers it to every US address, including PO boxes and APO/FPO addresses, without residential or delivery area surcharges. Q: What replaced USPS First-Class Package Service? A: USPS Ground Advantage replaced First-Class Package Service, Parcel Select Ground, and Retail Ground in July 2023. It combines them into one ground service for packages up to 70 pounds. ## Uyghur Forced Labor Prevention Act (UFLPA) URL: https://fulfillment.wiki/glossary/uyghur-forced-labor-prevention-act/ Category: Import & Customs Uyghur Forced Labor Prevention Act (UFLPA) is a US law, effective June 21, 2022, presuming that goods made wholly or partly in China's Xinjiang region, or by listed entities, use forced labor and are barred from import. Why it matters: CBP can detain shipments and require the importer to prove its supply chain is free of forced labor, often down to raw materials such as cotton. Cotton apparel, solar, electronics, and other categories have been frequent targets, so map your supply chain before you need to. Q: What happens if CBP detains my shipment under UFLPA? A: The importer must either show with clear and convincing evidence that the goods are not linked to Xinjiang or listed entities, or that they are not made with forced labor. Without that proof, the goods may be excluded and must be exported or destroyed. ## Value-Added Services (VAS) URL: https://fulfillment.wiki/glossary/value-added-services/ Category: Fulfillment & Warehousing Value-Added Services (VAS) is optional warehouse tasks beyond standard pick, pack, and ship, such as kitting, gift wrapping, labeling, bundling, inserts, relabeling, or product inspection, usually billed separately by a 3PL. Why it matters: VAS fees can quietly push cost per order above the quoted pick fee. Listing every special handling step during 3PL onboarding avoids surprise charges and missed instructions. Q: What counts as a value-added service at a 3PL? A: Anything outside standard picking, packing, and labeling, such as kitting, gift wrap, custom inserts, price ticketing, relabeling, or quality inspection. Each is usually priced per unit, per order, or per labor hour. ## Vendor Compliance URL: https://fulfillment.wiki/glossary/vendor-compliance/ Category: Freight & Retail Compliance Vendor Compliance is the set of packaging, labeling, shipping, EDI, and delivery requirements a retailer imposes on its suppliers, enforced through scorecards and financial penalties. Why it matters: Wholesale and marketplace programs such as big-box retail and Amazon Vendor Central come with detailed compliance manuals. Fines for errors can erase the margin on a purchase order, so assign an owner to each retailer's requirements. Q: What are the most common vendor compliance violations? A: Common violations include late or missing ASNs, incorrect or missing carton labels, late or early arrival against the delivery window, short shipments, and not following the retailer's carrier routing. Most can be prevented with an EDI checklist and a pre-ship audit. ## Vendor-Managed Inventory (VMI) URL: https://fulfillment.wiki/glossary/vendor-managed-inventory/ Category: Inventory Planning Vendor-Managed Inventory (VMI) is an arrangement in which a supplier monitors a customer's inventory and sales data and decides when and how much to replenish, within agreed stock limits. Why it matters: Brands selling wholesale to large retailers may be asked to run VMI using the retailer's sales data. It can reduce stockouts but puts forecasting responsibility on the brand. Q: What is the difference between VMI and consignment? A: VMI is about who decides when to reorder: the supplier manages replenishment. Consignment is about who owns the goods: the supplier keeps ownership until sale. A program can use either one or both. ## Virtual Bundle URL: https://fulfillment.wiki/glossary/virtual-bundle/ Category: Inventory Planning Virtual Bundle is a sellable product made of two or more component SKUs that is not pre-assembled, with its available quantity calculated from component stock and its components picked separately at order time. Why it matters: Virtual bundles let brands sell sets and gift packs without tying up inventory in pre-built kits. A stockout of any single component makes the whole bundle unavailable. Formula: Bundle available = minimum over components of (component available ÷ quantity per bundle, rounded down). Example: Shampoo available 300 units, Shampoo per bundle 1, Conditioner available 180 units, Conditioner per bundle 1, Travel bottles available 500 units, Travel bottles per bundle 2: Bundles available = 180 bundles. Q: How is the available quantity of a virtual bundle calculated? A: For each component, divide its available units by the quantity used per bundle, round down, and take the lowest result. That component is the constraint on how many bundles you can sell. ## Voice Picking URL: https://fulfillment.wiki/glossary/voice-picking/ Category: Systems & Automation Voice Picking is a picking method where workers wear a headset that gives spoken instructions, such as location and quantity, and confirm each step by speaking, leaving hands and eyes free. Why it matters: Voice picking is common in case picking and cold storage where hands-free work helps. For small-item ecommerce picking, scanners or lights are more common because each unit still needs barcode confirmation. Q: How does voice picking work? A: The system reads out a location, the worker confirms it by speaking a check digit, then hears the quantity, picks it, and confirms. The warehouse system records each confirmation as it happens. ## Void Fill URL: https://fulfillment.wiki/glossary/void-fill/ Category: Fulfillment & Warehousing Void Fill is packing material such as kraft paper, air pillows, or packing peanuts used to fill empty space in a shipping box so items do not shift or break in transit; also called dunnage. Why it matters: Void fill adds material and labor cost to every order, and a box that needs a lot of it is usually too big, which can raise dimensional weight charges. Many customers also judge a brand's sustainability by its void fill. Q: Is dunnage the same as void fill? A: In ecommerce the terms are used almost interchangeably for material that fills space and protects items in a box. In freight, dunnage can also mean bracing, airbags, or lumber used to secure loads inside a trailer or container. ## Wardrobing URL: https://fulfillment.wiki/glossary/wardrobing/ Category: Returns Wardrobing is a form of return abuse in which a customer buys an item, uses it briefly, such as wearing clothing to an event, and then returns it as unworn for a full refund. Why it matters: Wardrobing returns often cannot be sold as new, which turns a refund into a loss. Brands counter it with tamper-evident tags, inspection, and return limits for repeat abusers. Q: How do brands stop wardrobing? A: Common methods are large tamper-evident tags that must stay attached for a return, shorter windows on occasion wear, and inspection before refunding. Return history flags help identify repeat offenders. ## Warehouse Control System (WCS) URL: https://fulfillment.wiki/glossary/warehouse-control-system/ Category: Systems & Automation Warehouse Control System (WCS) is software that directly controls automated equipment such as conveyors, sorters, and storage systems, telling each machine what to do and reporting its status. Why it matters: Brands rarely deal with a WCS directly, but it matters when choosing a highly automated 3PL or building a facility. Integration between WMS, WES, and WCS often decides whether automation hits its expected throughput. Q: What is the difference between a WES and a WCS? A: A WES plans and balances work across the warehouse, while a WCS controls the machines that do the moving, such as conveyors and sorters, in real time. ## Warehouse Execution System (WES) URL: https://fulfillment.wiki/glossary/warehouse-execution-system/ Category: Systems & Automation Warehouse Execution System (WES) is software that sits between a WMS and warehouse automation, releasing and balancing work in real time across people, robots, and equipment based on current capacity. Why it matters: As warehouses add several types of automation, a WES helps keep them all busy and stops bottlenecks between picking, packing, and shipping. Some WMS and automation platforms include WES functions. Q: What is the difference between a WMS and a WES? A: A WMS manages inventory, locations, and orders. A WES decides in real time which work to release to which people or machines, so the floor runs smoothly as conditions change. ## Warehouse Management System (WMS) URL: https://fulfillment.wiki/glossary/warehouse-management-system/ Category: Systems & Automation Warehouse Management System (WMS) is software that directs and records warehouse activity: receiving, putaway, inventory locations, picking, packing, and shipping. Why it matters: If you use a 3PL, its WMS is your source of truth for inventory. Check integration quality with your store before signing. Q: Do I need a WMS if I use a 3PL? A: Usually not, because the 3PL runs its own WMS. Brands should check that the 3PL's system integrates with their store and gives them real-time inventory and order visibility. ## Wave Picking URL: https://fulfillment.wiki/glossary/wave-picking/ Category: Fulfillment & Warehousing Wave Picking is releasing groups of orders to the floor at scheduled times (waves), often grouped by carrier cutoff, shipping method, or zone. Why it matters: Waves let a warehouse hit carrier pickup times, but rigid waves can leave pickers idle between releases. Many modern WMSs use waveless or continuous release instead. Q: What is the difference between wave picking and batch picking? A: Wave picking is about when orders are released to the floor, in scheduled groups. Batch picking is about how a picker collects several orders in one trip, and the two are often used together. ## Webhook URL: https://fulfillment.wiki/glossary/webhook/ Category: Systems & Automation Webhook is an automatic message one system sends to another web address when a specific event happens, such as an order being placed, shipped, or cancelled, so the receiver does not have to keep asking. Why it matters: Webhooks let tracking numbers, order updates, and inventory changes move between systems within seconds. If a webhook fails without a retry or backup check, updates can be silently missed. Q: What is the difference between a webhook and an API? A: With an API call, one system asks another for data when it wants it. With a webhook, the sending system pushes a message automatically when an event happens, so the receiver gets updates without repeatedly checking. ## WISMO Rate URL: https://fulfillment.wiki/glossary/wismo-rate/ Category: Metrics & Unit Economics WISMO Rate is the share of orders that generate a customer contact asking about order status, where WISMO stands for "Where is my order?" Why it matters: WISMO tickets are often among the largest categories of support volume for ecommerce brands. Proactive shipping notifications and branded tracking pages are the usual fixes. Formula: WISMO rate = WISMO contacts ÷ orders shipped × 100. Example: WISMO contacts 600 contacts, Orders shipped 20,000 orders: WISMO rate = 3.0%. Q: How do you reduce WISMO tickets? A: Send proactive emails or texts at shipment, out for delivery, and on delays, show tracking in the account and order confirmation, and set realistic delivery promises at checkout. Fast, reliable shipping also reduces the questions in the first place. ## Yard Management System (YMS) URL: https://fulfillment.wiki/glossary/yard-management-system/ Category: Systems & Automation Yard Management System (YMS) is software that tracks and directs trailers and containers in a warehouse yard, including check-in, parking spots, dock door assignments, and movement between yard and dock. Why it matters: It reduces trailer search time and detention charges at busy sites. Brands usually encounter it through dock appointments and receiving delays at large 3PLs and retailer DCs. Q: Do small warehouses need a yard management system? A: Usually not. A YMS pays off when a site handles many trailers and containers daily and loses time or pays detention because of yard congestion. ## Zone Picking URL: https://fulfillment.wiki/glossary/zone-picking/ Category: Fulfillment & Warehousing Zone Picking is a method where each picker is assigned to one area of the warehouse and orders pass from zone to zone until complete. Why it matters: Works well in large facilities with many SKUs because pickers learn their zone and never walk the whole building. Q: What are the downsides of zone picking? A: Orders that span several zones need to be passed or consolidated, which can create delays if one zone falls behind. It also needs balanced workloads across zones to avoid bottlenecks. ## Zone Skipping URL: https://fulfillment.wiki/glossary/zone-skipping/ Category: Parcel Shipping Zone Skipping is consolidating many parcels into a truckload, moving them close to their destination region, and injecting them into a carrier network there. Why it matters: Converts high-zone parcel rates into cheaper freight plus low-zone rates. Q: When does zone skipping make sense? A: It makes sense when you have enough parcels going to one region to fill a truck or pallet economically. The savings on lower-zone parcel rates must exceed the freight cost of moving them closer.