By Paul Timms, Director at IT System Integrators Ltd

Choosing an Enterprise Resource Planning (ERP) system is one of the most significant and most expensive decisions a business will make. Get it right, and you have a platform that supports growth for at least a decade. Get it wrong, and you’re looking at cost overruns, frustrated teams, and the very real possibility of starting the whole process again. The stakes are high, which means the selection process deserves far more rigour than it typically gets.

An ERP system should efficiently connect the moving parts of your business including finance, operations, inventory, HR and sales into one single platform, replacing disconnected spreadsheets and siloed systems with real-time visibility and control.

For business leaders boggled by choice and concerned about making the wrong decision, my advice for choosing wisely includes the following:

1: Start with honest self-reflection

Before you look at a single demo or read a single brochure, stop and interrogate your own business. What’s genuinely working? Where are people wasting time on manual workarounds? What will you need from a system in three or five years, not just today?

These questions feel obvious, but they’re routinely skipped and that’s where the trouble starts. Choosing an ERP system because it ‘looks impressive’ rather than because it genuinely fits your operation is one of the most common and expensive mistakes.

Ask yourself: Have we clearly documented our actual processes, not the idealised versions of them? Do we know which requirements are non-negotiable and which are nice-to-haves? Have we spoken to people across every department including finance, operations, sales, logistics, not just the loudest voices in the room?
2: Get specific about what you actually need

ERP projects don’t typically fail because the software couldn’t do the job. They fail because the business never defined the job clearly enough. Your requirements need to be grounded in reality including: your actual workflows, your compliance obligations and your integration needs. Vague wish lists lead to vague evaluations, which lead to poor decisions.

When assessing vendors, look beyond the headline features. Consider scalability, will this system still serve you if you double in size? Consider the total cost of ownership, not just the licensing fee. Implementation, training, data migration, customisation, ongoing support and future upgrades all carry real costs that rarely appear on a price comparison sheet. The cheapest option today is often far from the cheapest option over five years.

3: Compare vendors with discipline

Every ERP vendor sounds exceptional in their sales pitch. The discipline lies in evaluating them on functionality, fit for your industry, long-term roadmap, support quality and whether their values align with yours. I’d also strongly recommend involving a structured scoring process and scripted demos based on your actual use cases, not theirs. Ask for customer references and call them to find out their experience of working with the vendor.

Consider whether you need an implementation partner as well as a vendor. A partner brings hands-on expertise in deploying the system to businesses like yours, managing the technical complexity, and supporting your team through the transition. The relationship matters enormously because if you don’t feel confident in your partner early on, the implementation will reflect that.

Not every ERP system is built for every business. A platform that works brilliantly for a manufacturer may be poorly suited to a professional services firm. Before you evaluate vendors, be clear about what your industry specifically demands, and filter accordingly. A system that requires endless workarounds to fit your sector is never a good investment, no matter how impressive it looks in a demo.

One of the earlier decisions you’ll need to make is whether to opt for a cloud-based or on-premises solution. For many businesses, particularly smaller or faster-growing ones, cloud ERP has become the more attractive option, offering lower upfront costs, faster deployment, automatic upgrades, and the ability to scale without significant additional infrastructure investment. On-premises solutions can still be the right choice in certain circumstances, but it’s worth going in with a clear-eyed view of the total cost of each model before you commit.

4: Don’t underestimate the human side

ERP is not just a technology project; it’s a change programme. If the people who use the system daily don’t understand it, trust it or feel supported through the transition, the investment will underperform regardless of how good the software is.

Think carefully about communication, training and giving teams the time and space to adapt. Ask your ERP vendor about how they can best help you navigate the change successfully, both initially and longer-term.

5: Should you use AI to help?

AI tools can add genuine value in specific parts of the selection process including modelling total cost of ownership across different scenarios, scoring vendor responses more consistently or identifying gaps in your requirements documentation. For structured, data-heavy analysis, AI can be a useful supporting tool.

But I’d caution against leaning on AI as a primary decision-making resource. Off-the-shelf AI tools only know what’s publicly available. They have no insight into your culture, your team’s unspoken workarounds or what truly differentiates your business. They also tend to default to the most heavily marketed solutions, which are not always the best fit. AI, used well, can reduce bias and speed up analysis, but it cannot replace the human judgement and contextual understanding that a well-structured, expert-led selection process provides.

Get the selection process right, and your ERP system becomes one of your most valuable business assets. It will be a platform that grows with you, connects your teams and gives you the clarity to lead with confidence. That outcome is absolutely achievable. It just requires asking the right questions before you commit to the answers.

Paul Timms is Director at IT System Integrators Ltd. For more information visit: itsystemintegrators.co.uk