There are a lot of factors that could cause an order picking error. Poor warehouse management, untrained staff, and filling high volumes of orders are all components of inaccurate order filling. By integrating a warehouse management system (WMS) and/or inventory management system with ecommerce stores, it can help reduce picking errors by easily being able to locate and scan the right inventory before the picking and packing steps begin. Then, before an order is packed, the order filler should verify that the proper items were picked and then pack the order.