FIELD GUIDE · SYSTEMS
Choosing a WES: what to settle before you talk to vendors
A warehouse execution system sits between the warehouse management system and the automation on the floor. It decides what work is released, in what order, and to which equipment or people. Choosing one is less about features and more about knowing exactly what you need it to do.
Settle these before the first demo
The problem you are solving. Write down the operational problem in one paragraph. Throughput at a constraint, labor balance across zones, or control of new automation are different problems with different answers.
What the WMS keeps and what the WES takes. Decide which system owns inventory, order release, wave or waveless logic, and task assignment. Unclear ownership here is a common source of integration problems later.
The interface inventory. List every system the WES must talk to: WMS, ERP, automation controls, labeling, carriers, and reporting. For each, note the data, the direction, and the timing.
Volume and growth. Document peak hourly volume today and the volume the system must support over its life. Ask vendors to show performance at that volume, not at a demo scale.
Who will run it. Decide who owns the system after go-live, internally or through a partner. A system the team cannot support becomes a dependency.
How to compare vendors fairly
Give every vendor the same written requirements, the same sample data, and the same scenarios, including a bad day with exceptions. Score them against your requirements, not against each other's feature lists.
Ask for references from operations similar to yours in volume, product type, and automation. Ask the references what took longer than planned.
Common mistakes
Buying for the demo. Demos show ideal orders at ideal volume. Your operation runs exceptions at peak. Score vendors on your scenarios, not theirs.
Underestimating integration. The interfaces to the WMS, controls, and carriers usually take longer than the software setup. Budget time for them from the start.
Leaving the floor out. Floor leaders know where work actually breaks. Bring them into requirements and vendor scenarios, not just training.
Starting a WES or WMS selection?
We support requirements, interface inventories, and vendor evaluation so the decision rests on your operation.
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