How to choose a WMS for a mid-sized UK warehouse

Choosing a warehouse management system (WMS) is one of the bigger operational decisions a growing warehouse makes. Get it right and stock figures become reliable, picking errors fall and new staff become productive quickly. Get it wrong and the warehouse inherits months of workarounds.

This guide is written for operations directors, warehouse managers and owners of mid-sized UK warehouses: typically one to three sites, tens to a few hundred staff, and enough order volume that spreadsheets, paper pick lists or a basic stock module no longer keep up.

Signs you have outgrown spreadsheets or a basic stock system

You probably need a WMS if several of these are true:

• Stock figures need checking before anyone trusts them. Sales or customer service ring the warehouse to confirm stock before promising an order.
• Picking errors reach customers. Wrong items, wrong quantities or missed lines show up as returns and credit notes.
• Knowledge lives in people’s heads. A few experienced staff know where things really are, and holidays or sickness slow everything down.
• Locations are vague. Stock is “in aisle 4” rather than in a specific, labelled bin or pallet location.
• Inbound deliveries are a surprise. The warehouse finds out what is arriving when the lorry turns up.
• Space feels full, but you cannot say why. Slow movers, fragmented stock and poor slotting take up room you may not need to rent.
• Reporting takes a day of spreadsheet work. Pick rates, accuracy and on-time dispatch are estimated rather than measured.

Standalone WMS or a WMS with ERP built in?

Before comparing features, decide which shape of system you are buying. Both approaches can work well; the right choice depends on what you already run.

	Standalone WMS + separate ERP	WMS with ERP built in
Best when	You already have an ERP you want to keep	You are replacing spreadsheets or several disconnected tools
Integration work	Orders, stock, products and receipts must sync between systems	One set of records, so little or no internal integration
Data ownership	Split across systems; disagreements need reconciling	One version of stock, orders and balances
Typical risk	Sync failures and duplicated master data	Making sure the ERP side covers your finance needs

If you keep an existing ERP, ask how the WMS integration handles failures, retries and stock adjustments. If you choose a combined system, check that its finance and purchasing features cover what your accounts team needs.

The must-have WMS features checklist

Use this list to compare vendors. Ask to see each item working, not described on a slide.

Receiving and put away

• Check in deliveries against purchase orders, recording what was received, short, damaged or quarantined.
• Scan stock from goods in to a specific storage location.
• See expected deliveries by day, and ideally manage delivery slots and warehouse opening hours.

Stock locations and accuracy

• Stock held at location level, not just as a total per product.
• An audit trail of every movement: who, what, from where, to where, when and why.
• A reason required for every manual adjustment.
• Cycle counting that tells staff which location to count next, so you avoid shutting down for a full stock take.

Picking, packing and dispatch

• Barcode confirmation of every pick, so the wrong item is caught before it is packed.
• Single-order picking and batch picking, plus wave picking if your volumes need it.
• Packing into boxes or pallets, with somewhere to record quality issues.
• Dispatch confirmed by scan onto the right vehicle or carrier.

Replenishment

• Directed replenishment from bulk storage to pick faces before a pick face runs empty.
• Clear tasks for operators, with the source and destination confirmed by scan.

Traceability, if you need it

If you handle food, health, cosmetic, chemical or other date-sensitive stock, check for lot or batch tracking, best-before and use-by dates, first-expired-first-out (FEFO) picking, recall holds and a trace from a lot to the customers who received it. GS1-128 label scanning saves a lot of typing.

Returns

• Returned units scanned back to stock, to quarantine or to write-off, with a reason.

Reporting and KPIs

• Live views of today’s picking, inbound deliveries, dispatches and exceptions.
• Pick accuracy, lines picked per hour and on-time dispatch measured from scans, not estimated.
• A wallboard view for the warehouse floor can help teams see progress against cut-offs.

Hardware: handhelds, phones and scanners

Dedicated rugged handhelds are durable but expensive. Many modern systems run in a web browser, so they also work on phones or tablets paired with a Bluetooth barcode scanner. Ask each vendor:

• Which devices and scanners have you tested?
• Does it work with the phone camera if a scanner fails?
• How does it behave on weak warehouse Wi-Fi?
• Will we need to buy label printers, and which label formats are supported?

Integrations to plan for

List every system that needs to talk to the WMS before you request quotes:

• Sales channels, such as Shopify or other online stores, marketplaces and EDI with trade customers.
• Carriers and couriers for labels and tracking.
• Accounting software, if the WMS or ERP will not handle your finance.
• Suppliers, for delivery booking or advance shipping notices.

Ask whether each integration is a standard connector, a configured integration or custom development, and who maintains it when the other system changes.

Understanding WMS pricing in the UK

UK WMS pricing usually combines several of these elements:

• Subscription or licence fee, per month or per year, sometimes per site.
• Per-user fees, often for internal staff only. Check whether supplier and customer portal users are charged.
• Usage-based fees, such as orders or order lines per month.
• Implementation and onboarding, as a fixed fee or day rate.
• Data migration and integrations, often quoted separately.
• Hardware, including handhelds, scanners and label printers.
• Support tiers, with different response times.

Ask for a three-year cost that includes all of these, and check what happens to the price when you add a site, more users or more volume. Be wary of a low headline price that relies on expensive add-ons for core features.

Rollout and data migration

The software is rarely the hardest part. Data and people are. A realistic plan includes:

1. Clean product data: SKUs, descriptions, units of measure, barcodes and pack sizes.
2. Location set-up: a consistent naming scheme and labels on every location.
3. Opening stock: a full count at go-live, loaded against locations.
4. Open orders: sales and purchase orders that are in progress on the day you switch.
5. Training: short, task-based training on the floor, with super-users on every shift.
6. Go-live support: someone from the vendor available during the first days.

Our guide to moving your warehouse off spreadsheets covers this in more detail.

Questions to ask every WMS vendor

• Can you demonstrate our receiving, picking and dispatch process using our own products and locations?
• What does a typical rollout look like for a warehouse of our size, and what do you need from us?
• Which of our integrations are standard, and which are custom?
• What is the full three-year cost, including implementation, users and devices?
• Who supports us after go-live, during which hours, and from where?
• How do you release new features, and can we influence what is built?
• Can we speak to a customer with a similar operation?
• How do we get our data out if we leave?

Red flags

• The demo never leaves the vendor’s own sample data.
• Core features such as scanning, cycle counting or replenishment are paid add-ons.
• Nobody can explain how stock corrections are audited.
• The implementation plan has no dates, owners or data requirements.
• Support is only available outside UK working hours.

Where Axera fits

Axera is UK warehouse management software with ERP built in, developed in Greater Manchester for mid-sized warehouses, wholesalers and distributors. It runs scan-confirmed check-in, put away, replenishment, single-order and batch picking, packing, dispatch, returns and cycle counting in a web browser on phones and tablets, alongside sales orders, purchasing and operational finance. Standard plans cover one to three warehouses and up to 200 internal staff users.

See the warehouse management features, compare guide pricing, or book a demo and we will walk through your own process.