Legacy Modernization Team blog: guides and explainers
Practical guides from Legacy Modernization Team written for agency owners and investors. Each article covers one topic in plain terms: how the work is done, what it costs, where the risks are and what to ask before you decide. Message us on WhatsApp if you want to talk through your own case.
Resources
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Resources
Questions to ask before outsourcing a mainframe migration
Five questions for any mainframe migration provider, with what a solid answer looks like and what should worry you: discovery, parallel running, data access, change and promises.
November 6, 2026 4 min read
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Resources
The seven Rs of application modernization, and how to choose
Retain, retire, rehost, replatform, replace, refactor and rebuild defined in plain terms, with a worked example of five applications that each get a different answer.
November 6, 2026 4 min read
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Resources
How to assess a legacy codebase before you migrate it
A practical outline of a legacy assessment: inventory, live versus dead code, data, interviews with operators, and a decision per component, shown on a COBOL batch billing run.
November 6, 2026 4 min read
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Resources
The strangler fig pattern for legacy migration, explained
How to replace a legacy system gradually while it keeps running: the routing facade, a worked example with customer statements, the data problem and when the pattern does not fit.
November 6, 2026 5 min read