SYSE.19:10 - Rationale

The pattern separates a changed source claim from a world-side engineering change. A changed episteme can alter the warranted basis of a decision while the engineered System remains unchanged. Revalidation Work and later engineering change therefore receive separate identities.

The least costly adequate revalidation follows changed claims only as far as they can alter engineering action. Reopening whole files is too broad, while comparing isolated words cannot establish engineering meaning or reliance. Preserving source editions, actual uses, performed checks, and decision dispositions makes the Method replayable with project-local trace sources.