10 ERP Implementation Mistakes That Cost a Fortune and Time: An IT Lawyer’s Perspective
13 listopadu, 2025
Imagine implementing an ERP system as doing a complete renovation of your company. You have a vision of a beautiful, modern space where everything works in harmony processes flow smoothly like background music. Except instead of hiring an experienced architect, you choose a “jack-of-all-trades” crew. And then the surprises start: walls aren’t where they should be, the budget evaporates faster than your team’s patience, and the ceiling starts to leak.
That’s exactly how many ERP implementations look. Technology is just a tool powerful, but blind. By itself, it won’t solve any of the underlying problems within your company’s structure — in fact, it can even make them worse. In my practice as an IT lawyer, I see this up close: when emotions, haste, and “blind faith in the vendor” replace planning, analysis, and accountability, costs skyrocket and projects sink.
So today, let’s take a closer look at 10 ERP implementation mistakes that can cost a fortune, a reputation, and a few sleepless nights. You’ll see that most of them don’t happen in the code but in people’s minds, processes, and contracts.
Brew yourself a coffee, sit back, and check whether your ERP project might be heading down the same path.
Mistakes in Strategy and Organizational Readiness
Lack of readiness for implementation.
Companies often believe that technology alone will solve their internal organizational problems. The correct order is the opposite: first, you need to organize your structures, ecosystem, and internal processes — only then should you implement technology. Without that, technology may only escalate existing issues.
Failing to verify process efficiency.
An ERP implementation is the perfect opportunity to review and optimize processes. Heavy system customization is often a symptom of an insufficient strategy and a weak change management plan. Remember: changing technology is easy, changing user habits — not so much.
Implementing too big or too small a system all at once.
Especially when risk is high, it’s better to take a step-by-step approach (the so-called rollout). This allows for real-time resolution of potential issues on a smaller scale.
Mistakes in Vendor Relations and Accountability
The “full trust in the vendor” rule.
Trust is the biggest trap of all. The vendor’s primary goal is to sell their solution — which doesn’t always align with the buyer’s need for a system that truly supports their business and technological objectives.
Being an irresponsible technology buyer.
Ultimately, the responsibility for the implementation lies with the client. Relying entirely on the vendor’s skills is a bit like “hoping for the best.” The client must have knowledge and experience in defining, planning, managing, and controlling projects.
Mistakes in Contracting and Project Management
Assuming there are universal solutions.
Digital transformations are often misaligned with an evolving business model and corporate strategy. A monolithic system can limit a company’s ability to introduce gradual changes.
Haste.
Rushing through planning, negotiations, and project actions means poor preparation. Awarding contracts too quickly may result in an unclear scope and acceptance of an unrealistic schedule. My advice: “Stop the madness, start slow — and only then hurry.”
Poorly negotiated contract.
Contract clauses have a way of “surfacing” during the project. It’s a mistake to treat the agreement as just a legal formality. An ERP contract is a business document — part of your strategy and risk analysis. The absence of specialists who understand implementation specifics on both sides can lead to prolonged negotiations (“time kills all deals”).
The project has no leader.
Organizations often have a project manager but lack someone who connects the dots between stakeholders and takes end-to-end responsibility. Treating accountability as collective responsibility is a mistake — because “no one at the top is named Everyone.”
Assuming an exit plan isn’t necessary.
Not every project reaches the finish line. An exit plan should be ready from day one and clearly described in the contract. It’s worth asking whether the goal is to continue the project because it’s best for the company — or just to save the face of the project manager or sponsor.
In my work, I often intervene to address these pain points — from precisely defining project scope in contracts (to avoid Mistake 7), to ensuring clauses that enforce active client responsibility (Mistake 5), to designing a robust exit plan (Mistake 10).
Key takeaway:
An ERP project requires synergy between business strategy, process efficiency, and a solid legal foundation.
What do you think? Which of these mistakes do you encounter most often in your practice? Share your experiences in the comments!
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