The hardest part of replacing a legacy system is not technology, but historical data migration and switching user habits.
The hardest part of replacing a legacy system is not technology, but historical data migration and switching user habits. This article draws on our hands-on experience serving more than 3,000 enterprise clients.
For legacy system replacement, we recommend a parallel-period strategy: run old and new in parallel for one business cycle, and switch only after the data checks out.
Data migration should be cleaned before migration; moving ten years of junk data into a new system is the most common cause of failure.
Microservices architecture makes gradual replacement possible: replace module by module instead of tearing everything down and starting over.
If you are evaluating a related project, feel free to talk with us — 16 years and more than 3,000 enterprise clients of experience may help you avoid a detour.