The signs a warehouse has outgrown its WMS

September 25th, 2026 | Technology

One of the tricky things about outgrowing a WMS is that it rarely looks like a failure.

The warehouse still runs. Orders still go out. Stock gets picked and packed, and the reports may look perfectly reasonable.

What tends to change is the amount of work happening around the system.

A spreadsheet appears to deal with something the WMS cannot quite handle. Experienced members of the team learn the workarounds. Stock discrepancies are corrected manually. Data gets exported because the information is there, but the answer somebody needs is not.

None of those things necessarily means there is a problem. Almost every warehouse has workarounds of some kind.

But when several of them become part of normal day-to-day operation, it can be a sign that the warehouse has moved beyond what its current system was designed to support.

Spreadsheets filling gaps the WMS can’t quite cover

Most warehouses have spreadsheets somewhere in the operation, and there is nothing inherently wrong with that.

What matters is why they are needed.

A common example is overflow stock. A SKU does not fit in its normal pick face, so the remaining stock is put somewhere else in the warehouse. If the WMS cannot record that second location properly, somebody needs another way of keeping track of it.

That might be a spreadsheet, a note on a goods-in sheet or simply the knowledge of the people who were there when the stock arrived.

The process can work perfectly well. The problem is that part of the warehouse is now being managed outside the WMS.

That becomes more noticeable when volumes increase, different shifts become involved or temporary staff need to find stock without knowing the warehouse as well as the permanent team.

The issue is not the spreadsheet itself. It is the gap it is filling.

Processes only experienced staff know how to navigate

Warehouses inevitably rely on experienced people.

They know where unusual stock tends to end up, which customers have particular requirements, which exceptions need checking and who to ask when something does not look right.

That experience is valuable. The problem comes when normal warehouse processes depend on it.

If a picker cannot find the quantity shown on the pick list, somebody who knows the operation may be able to resolve it in a couple of minutes. At modest volumes, occasional interruptions like that may be insignificant.

As the operation gets busier, the same workaround can become much more visible. More people need the same knowledge, new starters take longer to become productive and supervisors spend more time resolving exceptions.

The process still works, but it works because the right people know how to make it work.

A good WMS will not remove the need for experienced staff. It should reduce the amount of basic operational knowledge that has to sit in people’s heads rather than in the system.

Regular manual fixes to keep stock and operations aligned

Manual corrections are another normal part of warehouse life.

A cycle count finds a discrepancy and somebody adjusts the stock. A picker reports a line short and a supervisor investigates it. An occasional correction does not tell you very much.

The pattern matters more than the individual adjustment.

If the same stock, locations or processes repeatedly need correcting, people may effectively be keeping the system aligned with what is happening on the warehouse floor.

That is different from an occasional error.

Ideally, the WMS should reflect where stock actually is and what has happened to it. Where the warehouse and the system regularly drift apart, repeated manual correction can hide the underlying problem for quite a long time.

Data being exported because the answers aren’t available in the system

The fourth sign often appears away from the warehouse floor.

Someone wants to understand which customers generate the most exceptions, how a particular process is performing or where time is being lost.

The data exists, but getting the answer means exporting it and working through it in a spreadsheet.

Again, that is not automatically a problem. Spreadsheets remain useful tools, and there will always be analysis that makes sense outside the WMS.

It becomes more significant when the same report has to be rebuilt repeatedly because the same operational question keeps coming back.

At that point, the issue is not that somebody is using Excel. It is that a routine question about the warehouse cannot readily be answered from the system managing it.

Reading the signs together

None of these signs should be viewed in isolation.

A temporary overflow area during peak does not necessarily justify changing a warehouse system. If stock only needs additional locations for a few weeks each year, changing the slotting or creating another pick face may be a perfectly adequate answer.

Sometimes the right solution is a change to the process rather than the software.

Where an operation’s requirements fit a standard WMS well, there may also be little reason to choose anything more complicated.

The picture changes when several of these signs become permanent.

The spreadsheet has been in place for years. The same stock discrepancies keep coming back. New staff depend heavily on experienced colleagues to navigate routine exceptions. The same reports are rebuilt every week.

Taken together, those are signs of a widening gap between how the warehouse actually operates and what the WMS understands about it.

At that point, the question is no longer whether individual workarounds can be made to work. It is whether the system is still an appropriate fit for the operation it is supporting.

Timing matters too.

Replacing a WMS immediately before the busiest period of the year is rarely sensible. If peak is close, the more practical answer may be to stabilise the existing operation, understand the problems properly and plan any larger change for afterwards.

If the WMS is the problem, what needs to change?

Replacing one system with another only makes sense if the new system addresses the reasons the workarounds appeared in the first place.

If stock can legitimately sit in several places, the WMS needs to understand those locations. If routine processes depend on experienced staff knowing what to do next, more of that process needs to be represented in the system. If the same operational questions repeatedly require manual analysis, the information needs to be easier to get at.

The aim is not to eliminate every spreadsheet, manual decision or exception. It is to make sure the WMS reflects enough of the real operation that people are not continually compensating for its limitations.

What changed for customers who moved

That is the kind of change we have seen with customers moving to OrderFlow.

At Axell Logistics, Peter Bergsma described how OrderFlow “has a great way of keeping track of what is really happening in the picking face”.

At ProFS Group, Mark Handley highlighted how they “get new people into the warehouse and working inside of an hour”.

Those examples are different, but they are connected.

If the WMS records the locations where stock can actually be held, it can manage replenishment between them rather than relying on somebody to know where overflow stock has gone.

If the system can direct work and confirm activity through scanning, a new starter does not need to learn as much about the warehouse before they can begin productive work.

None of that happens simply by installing new software.

Locations have to be defined. Put-away and replenishment rules need to reflect the real operation. Customer-specific requirements and integrations need to be understood.

Where OrderFlow can meet a requirement through the existing product and configuration, that is the preferred approach. Where an important operational requirement falls outside that, the system can be developed where there is a genuine reason to do so.

A WMS you won’t outgrow

Warehouse operations do not stay still.

Customers change. Volumes change. New integrations are needed. Different services are introduced. Processes that worked well at one stage of the business may become restrictive later.

OrderFlow is designed with that in mind.

It is an established WMS platform rather than a bespoke system built separately for each customer. Most requirements should be handled through the product and configuration. Where an important requirement cannot reasonably be met that way, OrderFlow has the technical capability to develop the system further.

That same principle continues after go-live. The aim is not to treat implementation as the end of the project, but to make targeted improvements as the operation changes and experience shows where the system or workflow can be improved.

The objective is straightforward: the software should continue to support the way the warehouse needs to work, rather than gradually forcing the warehouse to build more processes around the limitations of the software.

You can find more about OrderFlow and how it supports complex warehouse and fulfilment operations at orderflow-wms.co.uk, or contact enquiries@orderflow-wms.co.uk to discuss your current requirements.