Prepare the replacement
- Preserve the executable environment, configuration and data.
- Recover requirements and identify business-critical exceptions.
- Extract data with semantics and reconciliation.
- Discover protocols, files and compatibility contracts.
- Choose replacement architecture or temporary compatibility layers.
Cut over safely
Deliver one bounded capability, run acceptance and regression tests, migrate representative data, then plan production cutover with backups and rollback. The existing no-source-code framework helps decide whether replacement is necessary; this guide covers execution.
Also see black-box migration, requirements recovery and the pillar.