Why so many ERP rollouts stall in year one

The software is rarely the problem

When an ERP rollout stalls, the postmortem usually points at the software: too rigid, too complicated, missing some feature that turned out to matter. In our experience, the software is rarely why it actually stalled. The plan for getting there was the weak point, and it was weak because nobody wrote it down in enough detail to notice.

The messy middle nobody plans for

Every rollout has a period where the old system and the new one both have to be right at the same time. Sales still needs to go out. Payroll still needs to run. That overlap is where most of the real risk lives, and it's the part that gets the least attention in a sales conversation about the new system, because it isn't the new system's job to solve it.

A rollout plan that skips straight from "old system" to "new system" without a detailed answer for the overlap period is missing its hardest part.

Data migration is a project, not a checkbox

"We'll migrate the data" is a sentence that hides weeks of work: deciding what counts as clean data, deciding what simply doesn't get migrated, and testing that the numbers actually match once they land in the new system. Rollouts that treat this as a one-week task at the end tend to discover the real scope of it during the first week of trying to close the books on the new system, which is the worst possible time to discover it.

Who actually owns the transition

The rollouts that go smoothly tend to have one person whose job is specifically the transition, not "also handle the transition on top of their normal role." Without that, the migration competes for attention with everything else already on someone's plate, and it's usually the migration that loses.

What we'd tell a business starting this now

Write the messy-middle plan before signing anything. Treat data migration as its own project with its own timeline. Name one person who owns getting the business from the old system to the new one, and make that explicitly part of their job for the duration, not an addition to it.