Warehouse Management System
A warehouse management system (WMS) is software that directs and records warehouse activity: receiving, putaway, inventory locations, picking, packing, and shipping.
Why it matters for ecommerce brands
The WMS is the source of truth for what is in the building and where, so its accuracy decides whether your storefront oversells. It directs receiving, putaway, picking, packing, and shipping, and records every move by scan. If you use a 3PL, you rely on its WMS and its integration with your store. For example, a brand selling on Shopify and Amazon needs WMS inventory synced to both, ideally within minutes. Test integrations, reports, and lot or serial tracking before signing a 3PL or software contract.
Common questions
- Do I need a WMS if I use a 3PL?
- 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.
- What is the difference between a WMS and an ERP?
- An ERP manages finance, purchasing, and company-wide records. A WMS runs the detailed work inside the warehouse, such as locations, picks, and scans, and sends results back to the ERP.
- When does a brand need its own WMS?
- Usually when it runs its own warehouse with more than a handful of staff or SKUs, or needs lot, expiry, or serial tracking. Brands that outsource to a 3PL normally use the 3PL's WMS.