Full rebuilds of legacy ERPs almost never ship. Strangler-pattern modernizations do. Seven steps we use every time:
1. Wrap the legacy DB in a modern REST API.
2. Freeze new features in the old UI.
3. Ship a modern React shell for one module.
4. Route incrementally.
5. Deprecate old screens.
6. Migrate reports last.
7. Sunset when 90% traffic is on the new UI.
12-24 weeks depending on scope. Ask for our modernization case study.
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