05 — Glossary · Practice & Governance
Fitness Function
GL-640 · also Architectural Fitness Function
An automated, objective check that measures whether a system still has an architectural property it needs, such as a dependency rule, latency budget or security setting, run as part of delivery.
Turns an architecture intent into a test that fails visibly, so governance happens in the pipeline rather than in a meeting.
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In the catalog
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Architectural fitness function (Thoughtworks Technology Radar) ↗
The definition above is written in our own words; the source is linked, not copied.