WMS selection checklist: from baseline to shortlist
A good WMS selection does not start with vendors — it starts with numbers from your own warehouse. Without a baseline you do not know which problem you are buying, and afterwards you cannot prove it was solved. This checklist runs in six steps from measurement to shortlist and is built for operations that want a defensible decision within two months.
Step 1 — Baseline: measure before you look
Record the following numbers for four weeks. They become your requirements and, later, your business case.
- Order lines per hour per picker, and the spread between your best and worst day.
- Mispick rate, measured at dispatch and again from complaints.
- Inventory accuracy per location, not per article.
- Search time: how many minutes a day go into looking for goods?
- Lead time from receipt to available on the shelf.
- Return rate with a reason code.
- Overtime hours in peak weeks versus a normal week.
Step 2 — Process inventory
Describe what happens today in each flow and where it breaks: inbound and receiving, putaway, replenishment, picking, packing, shipping, returns, cycle counting and stock corrections. Mark each step as paper-driven, scan-driven or system-driven. The steps still living on paper or in a spreadsheet are your biggest wins.
Step 3 — Split requirements into must, should and later
The biggest selection mistake is declaring everything a must-have. Cap the must list at ten and back every entry with a number from step 1. Anything you cannot back with a number is a should or a later.
Step 4 — Map the integration landscape
Draw your system landscape: ERP, accounting, webshop, marketplaces, EDI partners, carriers and any material handling equipment. For each connection note which data moves which way, how often, and who owns the master data. A selection that skips this stalls during implementation.
Step 5 — Demo script on your own orders
Send every vendor three real order examples up front and have them run live: a standard order, an order with an exception (partial, backorder or substitute article) and a return. No slides, no showcase data. At every deviation ask one question: is this configuration or custom development?
Step 6 — Reference calls
Speak with at least two customers in your own segment, preferably without the vendor present. Ask about implementation lead time, what disappointed them, what a change request costs and whether they would choose the same again.
Roles inside your own organisation
Selections rarely fail on technology and often fail on ownership. Name an operational owner from the warehouse, a process owner from finance or supply chain, and a single decision maker before you contact any vendor.
Signals to walk away
- The demo runs on the vendor's data, not yours.
- Every deviation is answered with "custom development, absolutely possible".
- There is no reference customer in your segment.
- The implementation plan has phases but no dates.
- Support runs exclusively over email in another time zone.
Next, model the cost of the shortlist with the BizBloqs ROI calculator, compare capability on the full WMS feature list and review customer implementation stories.
Frequently asked questions
- Where do you start when selecting a WMS?
- With a four-week baseline measurement: order lines per hour, mispick rate, inventory accuracy, search time, lead time and peak overtime. Those numbers define your requirements and later prove your business case.
- How many must-have requirements should a WMS selection have?
- Ten at most, each backed by a number from your baseline. If everything is a must-have you get expensive quotes and lose the ability to tell vendors apart on what actually matters.
- Who should be on the selection team?
- An operational owner from the warehouse floor, a process owner from finance or supply chain, and one decision maker. Without someone from the floor, the system gets worked around after go-live.
- How long does a WMS selection take?
- Two months is realistic for a mid-sized operation: four weeks of measurement running in parallel with process mapping, then two to three weeks of scripted demos and reference calls.
Ready to see BizBloqs on your own process?
Book a demo and we will walk your warehouse and order flow end to end — inbound, storage, picking, shipping, returns — and tell you honestly what BizBloqs would change.