We modernize aging systems without stopping the business that depends on them. Most engagements use an incremental migration strategy -- replacing components in stages behind a stable interface -- rather than a single high-risk rewrite.
Document what the legacy system actually does before changing it
Identify the highest-risk, highest-value component to modernize first
Run old and new systems in parallel during transition where possible
Verify data migrations line by line before cutover
Decommission legacy components only after the replacement is proven in production
No -- a full rewrite is often the highest-risk option. We evaluate incremental modernization first, and only recommend a rewrite when the existing system genuinely cannot be extended safely.