Direct answer. Location addressing is the system that assigns every storage location in a warehouse a unique code, generally combining aisle, bay, level and slot, in order to precisely locate where each reference is. It is essential for picking, inventory, and the proper functioning of the WMS, which relies on these codes to guide pickers and track stock movements.
Fixed or dynamic addressing: two approaches
There are two main addressing approaches. Fixed addressing assigns each reference a dedicated, permanent location: the operator or picker always knows where to find a given product, which makes human spotting easier but can create empty locations when stock of a given reference is low, and complicates adding new references. Dynamic (or random) addressing lets the WMS assign, on every receipt, the most relevant free location according to defined rules (proximity to the shipping zone, product compatibility, available space): it optimizes space use, but makes visual spotting impossible without a terminal or scanner, since a reference's location can change from one week to the next.
In practice, many warehouses combine both approaches: fixed addressing for very fast-moving references whose strategic location is decided by slotting, and dynamic addressing for the rest of the catalog, especially when the number of references (SKUs) is high and volatile. Addressing and slotting are complementary but distinct: slotting decides which reference deserves which type of location, addressing provides the coding system that lets you physically find it once that choice is made.
The choice of addressing mode also has a direct impact on inventory: fixed addressing makes quick visual counts easier since every reference has an assigned place, whereas dynamic addressing requires systematically relying on the WMS and scanning for any cycle count, since there is no memorable landmark for the teams.
FAQ
What is the difference between location addressing and slotting?
Location addressing is the coding system (aisle-bay-level-slot) that lets you physically locate a storage location. Slotting is the strategy that decides which reference should occupy which location, based on its turnover or weight. Slotting makes a choice; addressing makes it traceable.
What is dynamic (or random) addressing?
It is an addressing method in which the WMS itself assigns, on every receipt, the most suitable free location for the reference, rather than reserving a fixed location per product. It optimizes the warehouse's occupancy rate but requires a scanner or a terminal to locate an item.
Related terms
Slotting · Picking · SKU · Cycle counting · Occupancy rate · Warehouse / logistics platform · Pallet racking.
See also: warehouse picking methods.
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