Direct answer
Inventory your data, clean duplicates, map old fields to new, run test migrations, reconcile counts and totals, and plan cut-over and rollback.
Checklist
- List sources and owners
- Remove duplicates and fix formats
- Map fields and values
- Test with a sample
- Reconcile totals and counts
- Freeze changes during cut-over
- Keep the old system available until verified
Start small
Begin with a data inventory and a small test migration before committing to a full cut-over.
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Frequently asked questions
What is the short answer?
Inventory, clean, map, test, reconcile and plan cut-over and rollback.
What should a business do next?
Start with a data inventory and a small test migration.