SYSE.28:4.3 - Compare placements by the question they answer

Compare evidence reach, response time, user/provider burden, failure behavior and the remaining opportunity for change after each candidate placement. An input check, a provider check and a consumer check may answer different questions.

For an immutable artifact crossing a trust boundary, a producer’s check can qualify its construction while a consumer-side identity/trust check concerns the bytes actually received. For a coated component, an earlier dimensional result may guide manufacturing but cannot by itself support reliance on the final dimension.

Reuse a result only while the subject, relevant configuration, criterion and qualification conditions still match. A preserved result may be sufficient through controlled steps that cannot change the checked property of the subject. Name the specific change that requires rechecking; neither universal repetition nor universal reuse is the default.