A warehouse management system, or WMS, is software that manages stock inside a warehouse or distribution centre. It records where each item is stored and guides staff through receiving, putaway, picking, packing and dispatch.
Staff use scanners or mobile computers to scan locations and products. When an order arrives, the WMS creates a pick list, often sequenced to shorten walking, and updates stock as items are moved. It can apply rules such as FEFO, track batches and send shipment details to carriers and the sales system.
Retailers with a central warehouse or a large back-of-house store, online sellers and wholesalers use a WMS to ship orders accurately and keep stock records reliable. It typically connects to the inventory system, the ecommerce platform and the accounting software so stock levels match across channels.
Pitfalls include buying more than a small operation needs, poor integration that leaves stock figures out of sync, and a layout or location labelling that staff do not follow. Many smaller retailers can manage with the stock-location features in their inventory software rather than a standalone WMS.
A WMS reduces picking errors and time and improves stock accuracy, which becomes more important as order volumes and channels grow.