SYSE.35:1 - Problem frame

Use this pattern when a software change can reach a bounded population before wider use, and observations from that population can change the next exposure decision. Start with the actual deployed candidate and its deployment-test result from SYSE.41 or a current equivalent, not merely a package in storage.

The first result is an exposure-and-evaluation arrangement: the affected task, comparison, bounded population, observations, decision conditions and qualified recovery action. Once observations exist, it yields a bounded proceed, stop or inconclusive result. The responsible release holder supplies permission for the exposure and decides the reliance.

Do not require a canary for every change. A useful evaluation may be impossible when the relevant event is indivisible, too rare within the allowed interval, or has an irreversible consequence that cannot be bounded. Use a different qualified risk-reduction Method in those cases. A deployment whose actual state is still unknown returns to SYSE.41.