The systematic approaches used by warehouse management systems to determine which specific inventory units should be assigned to fulfill customer orders. These methods establish rules for selecting from available stock based on criteria such as FIFO (First In, First Out), LIFO (Last In, First Out), FEFO (First Expired, First Out), lot numbers, or location proximity.
Proper allocation methods are critical for maintaining product quality, optimizing picking efficiency, and meeting regulatory requirements. They directly impact inventory turnover, reduce waste from expired goods, and ensure consistent order fulfillment. For example, a food distribution center might use FEFO allocation to ensure products with the shortest shelf life are shipped first, minimizing spoilage costs. Meanwhile, a manufacturing facility might prioritize FIFO to maintain consistent material quality.
Advanced WMS platforms allow warehouses to configure multiple allocation rules simultaneously and apply different methods based on product type, customer requirements, or seasonal demands.
