Warehouse management systems (WMS)
A warehouse management system (WMS) directs and records physical work inside a warehouse: receipt, putaway, replenishment, picking, packing, shipping and counting.
Most of its users are on foot or on vehicles and work from handheld devices.
Table of Contents
Summarize with:
Key facts
- WMS users work on foot or on vehicles, with handhelds, ring scanners and vehicle terminals.
- Stock is held per location, and work is assigned to people as tasks.
- Accuracy is maintained by cycle counts.
- Blind counts hide the expected quantity, because counters tend to confirm the number they see.
- Exceptions such as short, damaged or wrong item should be one tap away.
What it covers
| Aspect | In this category |
|---|---|
| Users | On foot or on vehicles |
| Devices | Handhelds, ring scanners, vehicle terminals |
| Stock | Held per location |
| Work | Tasks are assigned to people |
| Accuracy | Maintained by cycle counts |
The work runs from receipt and putaway through replenishment to picking, packing, shipping and counting.
Who uses it
| Role | Device | What they need |
|---|---|---|
| Picker, receiver, counter | Handheld or ring scanner | One task at a time, one clear action, a fast exception path |
| Forklift driver | Vehicle terminal | Large targets, the next task and its location |
| Warehouse supervisor | Desktop or tablet | Workload, open tasks, discrepancies |
| Warehouse manager | Desktop | Site structure, capacity, accuracy |
What makes it hard to design
Mobile first. Mobile screens are built around one task and one action.
Scan order. Location is confirmed by scan before quantity.
Exceptions. Short, damaged or wrong item are daily events and need their own path.
Design implication
Large sites
In a large warehouse, finding an item takes more time than recording it. Location addressing and navigation are part of the interface.
Trade-offs
- A drawn floor plan helps new staff find their way, but someone has to redraw it whenever racks move. A plain hierarchy costs little to maintain and shows nothing of the building’s layout.
- An easy manual path keeps transactions recorded when scanning fails, and lowers the share of scanned entries.
Common mistakes
- Counting screens that show the expected quantity. Counters tend to confirm the number they see.
- Quantity entered before the location is confirmed
- Desktop screens shrunk onto a handheld
- Exceptions hidden behind menus
Related experience