Prevents skipped testing
Synthetic test databases hide exactly the problems that break real migrations: unusual character encodings, years-old partial records, orphaned attachments, edge cases nobody remembers creating. Always run the rehearsal migration against a genuine copy of your production database.
Prevents skipped testing
A QA checklist catches what's known to matter. Your finance team closing an actual invoice, or your warehouse team running an actual manufacturing order, catches what nobody thought to write down. User acceptance testing isn't a formality — it's where the workflow-specific issues surface.
Prevents a paper rollback
A rollback plan that’s never been tested is a hope, not a plan. Restore the pre-migration backup during the test migration stage and confirm it actually works. That’s the difference between "we have a rollback plan" and "we know exactly what happens if we need it."
Prevents rushed timing
Month-end close, peak season, a major client's onboarding week — none of these are good times for a production cutover, even a well-tested one. Pick the downtime window based on when disruption costs the least, not when it's convenient to schedule.
Prevents a quiet handoff
The issues UAT doesn’t catch tend to surface in the first two weeks post-launch — a report that only runs at month-end, an integration that only fires on a specific trigger. Have a defined priority-response window after go-live, not an informal "let us know if something comes up."
