01 / DISCOVERMap the business and the current system.
Catalog model, markets, customers, order flow, payment and logistics providers, existing software, production traffic and constraints.
- Current-state inventory
- Critical route and integration map
- Business rules and pain points
- Risk and dependency register
02 / BLUEPRINTDefine boundaries before screens.
Separate the commerce core, customer experiences, adapters and operational tooling. Decide what should be retained, wrapped, replaced or retired.
- Target architecture
- Data and contract boundaries
- Migration sequencing
- Acceptance and rollback criteria
03 / BUILDShip usable vertical slices.
Build around complete customer and operational flows instead of accumulating disconnected modules that only work at the end.
- Production-compatible releases
- Automated checks
- Observable failures
- Performance budgets
04 / ROLL OUTMove traffic with evidence.
Compare baselines, enable changes in bounded routes, verify callbacks and workers, and keep a known rollback path until the new path is proven.
- Pre/post-deploy baselines
- Smoke tests
- Operational handover
- Iterative optimization