If you run a UK machine shop or fabrication business, there is a fair chance your MRP was chosen a long time ago. Access FactoryMaster and WinMan are two of the names we meet most often in established SME factories, and both have earned their place. They are UK-built, well supported and have customers who have stayed with them for well over a decade.
So this is not a post about why they are bad. They are not. It is a post for the operations director or MD who is starting to search for a FactoryMaster alternative or a WinMan replacement, and wants an honest way to decide whether moving is worth the disruption.
Why people start looking for a FactoryMaster alternative
Most people who get in touch with us are not unhappy with their MRP as an MRP. Material planning works. Purchase orders go out. Stock gets counted. The frustration is usually somewhere else.
The common triggers we see look like this:
- A new MD or operations director arrives and asks a simple question, such as “which jobs are late right now?”, and nobody can answer it without walking the floor.
- A major customer changes the rules. A new aerospace or defence contract demands traceability or on-time delivery reporting the current setup was never configured to produce.
- Growth breaks the workarounds. The spreadsheets that sat alongside the MRP were fine at 25 people. At 60 they are a full-time job.
- An upgrade or renewal lands and forces a conversation about what the business is actually getting for the money.
- Job costing is guesswork. The quote says one thing, the finished job says another, and nobody can say where the hours went.
None of those are really MRP problems. They are shop floor problems. That distinction matters, because it changes what you should be shopping for.
What FactoryMaster and WinMan do well
Any fair comparison starts with credit where it is due.
Access FactoryMaster
FactoryMaster has been around since the 1990s and has been part of the Access Group since 2013. It is aimed at small and medium manufacturers with complex, multi-level production, and its sector list reads like a map of UK engineering: aerospace, precision engineering, electronics, fabrication, automotive and more. Reviewers regularly praise its technical support, and some users have been on it for 16 years or longer. If you already run other Access products for finance or payroll, there is a real benefit to staying with one supplier.
WinMan
WinMan is a full ERP with more than 30 years behind it and a UK-based support and development team. Its central strength is that manufacturing, financials, CRM and warehousing all sit on a single database. It offers batch and serial traceability, a product configurator, and cloud or on-premise deployment. For a business that genuinely wants to replace its accounts system, CRM and production system in one programme, WinMan is a sensible shortlist candidate.
Both are serious, established products. If either is working for you, the case for change has to be strong.
Where legacy MRP tends to leave gaps
The gaps are less about any single vendor and more about the shape of traditional MRP and ERP. They were designed to plan materials and manage transactions. Real-time execution on the shop floor usually came later, as a module, a bolt-on or a separate project.
Visibility after the job is released
Planning tells you what should happen. It does not tell you what is happening. If progress is still booked on paper travellers and keyed in at the end of the shift, or the end of the week, your system is always looking backwards. By the time a late job shows up on a report, the customer has usually already phoned.
Actual versus estimated job cost
For a high-mix, low-volume shop, the question that decides the year is simple: did we make money on that job? Answering it needs labour and machine time captured against each operation as it happens. Without that, costing relies on estimates, and estimates drift. We covered the mechanics in our guide to tracking actual vs estimated job cost.
Modules and scope
Reviewers of established MRP systems often mention a meaningful upfront investment in licences, implementation and training, and a learning curve that reflects the breadth of the product. With a full ERP, the scope is bigger again, because finance and CRM are part of the same project. That is not a flaw. It is simply the cost of breadth, and it is worth weighing against the problem you are actually trying to solve.
Three ways to replace legacy UK MRP
When a business decides the current setup is not enough, there are broadly three routes.
1. Replace it with another MRP or ERP
This is the like-for-like swap. It can make sense if your core planning and finance setup has genuinely run out of road. It is also the biggest project, and if the underlying pain is shop floor visibility, you can end up with a new system and the same blind spot.
2. Keep the MRP and add a MES alongside it
Often overlooked, and often the most sensible. A MES captures what is happening on the shop floor in real time: who is on which job, how long each operation took, what was scrapped and why. Your existing MRP or accounts package carries on doing what it does well. We wrote about this approach in more detail in how to get shop floor visibility without replacing your ERP.
3. Move to a combined MRP and MES built for SMEs
For smaller businesses where the old MRP is only lightly used, or where most of the real planning has already migrated to spreadsheets, a single modern system covering planning, purchasing, stock and shop floor execution can be simpler than running two. This is where DynamxMFG sits, alongside the accounts package you already run. We integrate with Sage, so finance stays where it is.
What a practical switch looks like
Here is how this plays out for a typical business. Take a 45-person precision engineering subcontractor in the Midlands. It has run the same MRP for a decade. Planning works, but job progress lives on paper travellers, the production manager spends his mornings chasing status, and nobody trusts the job cost figures enough to use them for quoting.
The first question is not “which system?” It is “which problem?” If the answer is visibility and costing, the project scope shrinks dramatically. You are not rebuilding finance. You are putting data capture on the shop floor, connecting it to your routings and work orders, and getting live job status in front of the people who need it.
A realistic plan runs in phases:
- Weeks 1 to 4: agree the process, clean up part numbers, BOMs and routings, and decide what data comes across from the old system. Most businesses migrate open orders, live stock and active part data, not twenty years of history.
- Weeks 5 to 8: configure the system, set up work centres and shop floor stations, and train the people who will use it every day.
- Weeks 9 to 12: go live, often starting with one cell or one product family, then widen out.
We set out the full plan in our 90-day manufacturing software implementation guide. DynamxMFG customers typically go live inside 90 days, against the 18 months many traditional ERP programmes run to.
If your last project went badly
Many businesses with a long-standing MRP have one reason for staying above all others: the last implementation was painful, and nobody wants to repeat it. That is a fair worry. Projects usually fail for predictable reasons, such as unclear scope, poor data, and shop floor staff who were never consulted. We looked at how to avoid those traps in we’ve tried a system before and it failed.
Questions to ask before you move
Whichever route you take, and whichever vendor you talk to, these questions tend to separate a good decision from an expensive one:
- When a job is running late, how long does it take us to find out, and who tells us?
- Can we see the margin on the last job we shipped without opening a spreadsheet?
- Do we want to replace our accounts system this year as well? If not, do we need an ERP at all?
- What exactly would we migrate, and who owns cleaning the data?
- What will the shop floor team actually touch every day, and have they seen it?
- What is the full cost over three years, including modules, implementation, training and support?
- Who supports us when it breaks, and are they in our time zone?
If you are honest about those answers and the pain still is not worth the disruption, stay where you are. That is a perfectly good outcome. If the answers point to the shop floor, you have a much smaller and faster project in front of you than a full system replacement.
Frequently asked questions
Is DynamxMFG a direct replacement for Access FactoryMaster?
It can be, depending on how you use FactoryMaster today. DynamxMFG covers MRP functions such as BOMs, routings, work orders, purchasing and stock, with real-time shop floor tracking at its core. Some businesses replace their MRP outright. Others keep it for planning and add DynamxMFG for shop floor execution. The right answer depends on where your pain actually is.
Do I need to replace my accounts software as well?
No. DynamxMFG is not a finance system and does not try to be. It integrates with Sage, so your accounts stay exactly where they are. If you want finance, CRM and manufacturing replaced in one programme, a full ERP such as WinMan may suit you better.
How long does it take to switch from a legacy MRP?
DynamxMFG customers typically go live within 90 days. The biggest variable is data quality. Clean part numbers, BOMs and routings make migration much quicker, so it pays to start tidying before you sign anything.
What data can we bring across from our old system?
Most businesses migrate customers, suppliers, stock items, BOMs, routings, open orders and current stock levels. Closed historical transactions usually stay in the old system for reference. We agree the migration scope with you before configuration starts.
What if we are not ready to replace anything yet?
That is fine. Plenty of manufacturers start by adding shop floor data capture alongside their existing MRP. It gives you live job status and real job costs within weeks, and it tells you whether a bigger change is ever worth making.
Still on a legacy MRP and wondering whether it is time to move? DynamxMFG gives UK SME manufacturers real-time shop floor tracking, job costing and planning in one system, alongside the accounts package you already use, with a typical go-live inside 90 days.
Book a 30-minute demo and we will show you what a switch would look like for your shop floor.
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A 30 minute call, a live look at DynamxMFG, then we configure it on your data and show it back to you.
