Method and gate logic
Readiness = completed declared gates ÷ 12 × 100
Unchecked ownership, archive or rollback, source export, approved mapping, representative test import, reconciliation, or acceptance ownership holds go-live regardless of the percentage.
Use and limitations
Use the plan to structure owners, evidence, and phase reviews. It does not estimate effort or guarantee a migration because system configuration, integrations, permissions, compliance, vendor constraints, and data volumes vary.