Most ERP decisions go wrong before the first line of requirements is written. Teams shop for software before they've mapped the workflows the software needs to support — inventory movement, approval chains, reporting cadence — and end up forcing the business to bend around a system it never fit.
Start with the process, not the product. Document how work actually moves today: who approves a purchase order, how stock gets reconciled, which reports leadership checks every Monday. That map becomes your evaluation checklist, not a feature list from a vendor's website.
Off-the-shelf platforms win on speed and cost predictability. They're a strong fit when your processes are close to industry-standard and you need to be live in months, not a year. Custom-built ERP earns its cost when your operation has a genuine edge case — a manufacturing line, a multi-branch inventory model, a compliance requirement — that generic software fights against.
Whichever direction you take, budget real time for data migration and staff training. The system that looks perfect in a demo is only as good as the historical data that moves into it and the people who use it daily. A phased rollout, module by module, consistently beats a single big-bang launch.