Managing UAT Across Multiple ERP Projects: A Consultant's Survival Guide

If you've ever had three clients in UAT simultaneously — one on Business Central, one on SAP, and one on a platform like NetSuite that you last touched six months ago — you already know the feeling. It's not quite panic. It's more like a persistent, low-grade dread that something important is slipping through the cracks.

Because it probably is.

Managing UAT on a single ERP project is hard enough. Managing it across multiple clients, with different go-live dates, different stakeholder expectations, and wildly different levels of testing maturity? That's where consultancies — and the project managers who lead them — either build a proper process or quietly burn through their best people.

1. The Multi-Project UAT Nightmare

Here's what multi-project UAT actually looks like in most ERP consultancies. It's Monday morning. You have:

• Client A — mid-UAT on a finance module, with 47 unresolved issues and a go-live in three weeks
• Client B — just starting UAT on a warehouse rollout, and their testers have never done this before
• Client C — technically finished UAT, but their project sponsor won't sign off because "it doesn't feel ready"

Each client has their own spreadsheet. Their own naming conventions. Their own definition of what "critical" means. And your senior consultant — the one who actually knows how to run UAT properly — is splitting their time across all three, context-switching between completely different ERP platforms and business processes.

2. Why Most Consultancies Don't Have a Repeatable UAT Process

This is the part nobody talks about at partner conferences. Most ERP consultancies — even the large ones — don't have a standardised UAT methodology. They have tribal knowledge.

Ask three senior consultants in the same firm how they run UAT, and you'll get three different answers. Different templates. Different phase names. Different ideas about what constitutes a "passed" test. It works when those individuals are running their own projects. It falls apart when the consultancy needs to:

• Onboard new consultants quickly — there's nothing documented to train them with
• Move people between projects — they have to learn a completely new process each time
• Report consistently to leadership — every project presents UAT status differently
• Demonstrate quality to clients — there's no standard to point to

The root cause is usually simple: every project reinvents the wheel because it's faster in the moment than building something reusable. The first project's UAT plan gets cobbled together under pressure. The second project copies it and modifies it. By project five, nobody knows which version is the "right" one, and the original author has left the firm.

3. Building a Reusable UAT Framework

The consultancies that handle multi-project UAT well have all done the same thing: they've invested in building a repeatable framework that works across engagements. Not a rigid methodology that ignores client differences — a flexible structure that eliminates the repetitive groundwork.

Here's what that actually looks like in practice:

Template Test Libraries by ERP and Module

If you're a Business Central consultancy, you know that every finance implementation needs to test purchase invoices, sales orders, bank reconciliations, and VAT returns. Every. Single. Time. So why are your consultants writing those test cases from scratch on every project?

• Build template libraries organised by ERP platform and module (Finance, Supply Chain, HR, etc.)
• Include the common scenarios that apply to 80% of implementations
• Leave clear gaps for client-specific processes and customisations
• Version control them so improvements from one project feed back into the templates

Standardised Phases and Terminology

This sounds trivial. It isn't. When one project calls it "SIT" and another calls it "integration testing" and a third calls it "combined testing", your consultants waste time translating between projects and your clients get confused.

Pick your phase names. Document them. Use them everywhere:

• Unit Testing — individual process validation
• Integration Testing — cross-module and cross-system flows
• User Acceptance Testing — business validation by end users
• Regression Testing — re-validation after fixes and changes

Faster Onboarding for New Testers

One of the biggest time sinks in multi-project UAT is onboarding. Client-side testers often have no experience with structured testing. Your junior consultants need to learn the process for each new project. A reusable framework solves both problems — new testers get consistent training materials, and your consultants follow the same process regardless of which project they're assigned to.

4. Giving Clients Visibility Without Creating More Work

Here's an email every ERP consultant has received at least fifty times: "Hi, just checking in — could you send me a quick update on where we are with UAT?"

There's no such thing as a "quick update" when your testing data lives across three spreadsheets, a shared drive, and someone's inbox. Compiling that status report takes 30-60 minutes per client, per week. Multiply that by five active projects and you've got a consultant spending an entire day every week just telling people what's happening instead of actually doing the work.

The solution isn't better spreadsheets. It's self-service visibility.

What Clients Actually Need to See

• Overall progress — how many tests are planned, in progress, passed, and failed
• Outstanding issues — what's blocking progress and who owns the resolution
• Sign-off status — which areas have been formally accepted and which haven't
• Go-live readiness — a clear picture of whether the project is on track

When clients can see this information themselves — through a real-time dashboard rather than a weekly email — two things happen. First, the "quick update" emails stop. Second, clients feel more confident in the process because they're not waiting for information to be filtered through their consultant.

Self-Service Sign-Off

The traditional approach to UAT sign-off in consulting engagements is painful. The consultant compiles a summary. Sends it as an email attachment. The client reviews it, has questions, sends it back. More emails. Eventually, someone signs a PDF and it gets filed somewhere.

A proper UAT platform lets clients review completed testing and sign off directly — with a full audit trail. No chasing. No PDFs. No ambiguity about what was actually accepted.

5. Scaling from 2 Projects to 20

There's a tipping point that every growing ERP consultancy hits. Two or three concurrent projects are manageable with spreadsheets and good people. Five projects start to feel chaotic. Ten projects require fundamentally different approaches.

The consultancies that scale successfully have worked out what to centralise and what to keep project-specific.

What to Centralise

• UAT methodology and phase definitions — the "how we do testing" playbook
• Template test libraries — reusable assets that improve with every project
• Tooling and platform — one UAT tool across all projects, not a different approach per client
• Reporting standards — consistent metrics so leadership can compare project health
• Onboarding process — standard training for both consultants and client testers

What to Keep Project-Specific

• Client-specific test cases — the customisations and edge cases unique to each business
• Timelines and phase scheduling — each project has its own go-live date and dependencies
• Stakeholder communication cadence — some clients want weekly calls, others want to be left alone
• Issue severity definitions — what's "critical" for a retailer might be "medium" for a manufacturer

When Spreadsheets Break

You'll know you've hit the tipping point when:

• You can't answer "how are our projects doing?" without spending an hour pulling data together
• Consultants are spending more time on UAT administration than on actual testing
• Clients are getting inconsistent experiences depending on which consultant runs their project
• You've lost track of which spreadsheet version is current for at least one project
• A consultant leaves and their project knowledge leaves with them

At this point, the choice is straightforward: invest in a proper multi-project UAT platform, or accept that quality and consistency will degrade as you grow. There is no third option. You can't spreadsheet your way out of a scaling problem. For guidance on what to look for when choosing a platform, see our guide on UAT tools for ERP consultants.