Resources

Guides for leaders deciding what to do with a legacy system.

Practical, vendor-neutral answers to the questions that come up before any modernization decision.

Technical debt

The cost of technical debt: how to see what it is delaying

Technical debt costs capacity, delay and risk. A practical way for business leaders to estimate the cost of waiting on the initiatives a legacy system holds back.

Modernization

Legacy application modernization: keep, upgrade, refactor or rebuild?

A decision guide to legacy application modernization options, when each one fits, why big-bang rewrites disappoint and what an incremental rebuild needs to succeed.

Code freeze

Modernization without a long code freeze

A whole-system code freeze is not inherent to modernization. How incremental replacement avoids one, when a short scoped freeze still makes sense and what to agree first.

Documentation

Undocumented business logic: how to recover the rules your legacy system runs on

Why documentation generated from code is not enough, and a practical method to recover a legacy system's business rules from production evidence, code, schema and owner review.

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