Guide
A practical approach to modernizing legacy systems
What good looks like
A concise framework technology leaders can apply to the next investment decision.
STEP 01
Map business-critical flows
Understand where value, risk and operational coupling live before choosing what to change first.
STEP 02
Create an architectural seam
Use APIs, events and modular boundaries to make controlled change possible around the legacy core.
STEP 03
Modernize in evidence-led slices
Release small end-to-end capabilities that improve the business and prove the target architecture.
STEP 04
Retire deliberately
Decommission only after traffic, data, operations and ownership have safely moved to the new path.
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