A good migration protects the agency record and changes the process with intention. Start with the work staff need now, map it to the child record, and verify the transfer before cutover.
The transfer is only one part. Ownership, source truth, access, and reconciliation determine whether staff can trust the new record on day one.
A blanket import carries old duplication and dead fields into the new product. The first pass should support current work and required recordkeeping.
The agency should know who approves the mapping, who reviews exceptions, and where staff work during the transition.
A transfer report that says complete is not enough. Admins need visible counts, reviewed exceptions, and a tested way back to the source if a fact is wrong.