IBM i ERP Buyer's Guide
A planning guide for IBM i teams weighing ERP modernization, extension, or replacement without losing operational continuity.
Separate the software question from the business question
ERP evaluations on IBM i often get framed as a software selection project when the real question is whether the business processes running on that ERP still fit how the company operates today. Buyers should involve finance, operations, and IT leadership early, since ERP change affects far more than one department.
That framing helps prevent a purely technical evaluation from missing the actual business risk.
Document what the current system really does
Most IBM i ERP environments carry years of customization that nobody has fully documented. Before comparing vendors or modernization paths, buyers should map critical workflows, customizations, integrations, and reporting dependencies.
This step is tedious, but it is what separates an informed decision from a demo-driven one.
- Inventory active customizations and who depends on them
- List every system that currently integrates with the ERP
- Identify reporting that leadership relies on but rarely questions
Weigh modernize, extend, and replace honestly
Full ERP replacement is rarely the only option, and it is often the riskiest one. Buyers should seriously evaluate modernizing the interface, extending functionality through integration, or replacing only the weakest module before committing to a full platform change. The right path depends on vendor roadmap commitment, internal change tolerance, and how much disruption the business can actually absorb.