STR.12:5.2 - A changed filter is not a changed observation

A working direction admits proposals that reduce rework this quarter, fit the available time, can be checked within two weeks and avoid irreversible migration. A proposal fits three conditions but fails the fourth.

Later, a participant suggests allowing irreversible migration where specified transition protection can be provided. That is a proposal to revise the filter, not evidence that the migration was always eligible. The responsible body compares the reason for the change and its consequences before adopting or rejecting it.

If the revised rule is adopted, the migration can be reconsidered for eligibility under that rule. Its actual rework contribution, time, checkability, protection and resource allocation still require their own support. If the proposal is rejected, the existing filter continues. Earlier observations do not need rewriting in either case.