What conditions let an engineering lesson be reused without turning it into stale folklore or detached documentation?
Working Criteria
Reusable engineering knowledge should have an owner, a boundary, evidence whose authority is clear, a revision and return path, and a current next-use context.
Early Test
A lesson is reusable when a later actor can find the current owner, verify the part of the work their environment can actually support, and return new evidence when the lesson needs repair or no longer applies.