Migration is a sequence of decisions about authority, quality and relationships. Moving every column unchanged usually preserves the problems a new system was meant to solve.
Step 01
Name authoritative sources
Identify the owner and intended use of every people, position, organization, case and agreement source.
Step 02
Map to the target model
Define how fields, controlled values, identifiers and relationships translate into the approved UnionStack configuration.
Step 03
Reconcile in stages
Validate representative samples, compare counts and exceptions, then obtain business-owner acceptance before cutover.