Legacy Core Systems Modernization (ERP, Core Banking) Playbook
- Executive
- Advanced
- Template Included
A framework for modernizing legacy core systems — ERP, core banking, and similar mission-critical platforms — that manages the unique risk of replacing infrastructure the entire business depends on continuously, using phased migration and parallel-run strategies rather than risky big-bang cutovers.
Why not just do a full cutover on a single go-live date?
Big-bang cutovers concentrate all migration risk into a single moment, with the entire business dependent on a system that's never run in production before. Phased migration and parallel-run strategies spread and de-risk that transition, even though they take longer and cost more to run in parallel temporarily.
How is this different from the general Legacy to Cloud Modernization
Playbook already in this series? That playbook covers cloud migration and architecture broadly. This one is specifically about mission-critical core systems of record (ERP, core banking) where the business genuinely cannot tolerate downtime or data integrity risk — a narrower, higher-stakes case requiring specific phased and parallel-run techniques.
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