Library / Problem Structuring and Decision Support Principles Framework
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Source changed 2026-10-03 11:52:20 UTC · snapshot created 2026-10-03 11:53:41 UTC · last check 2026-10-03 14:05:05 UTC

A changed premise changes the right claim

The useful follow-up question is what evidence can reach the board before renewed consideration. PSD.14 compares an end-of-season review, continuous pump telemetry and a bounded pre-decision evidence arrangement. Telemetry alone cannot settle deployment permission, reachable assistance or the staged alternative. The bounded arrangement is selected in this example only after supplier availability, access, interpretation time and the receiving date are supplied.

In a separate hypothetical continuation, the board authorizes an access study, not a pump purchase. A qualified return establishes that the mobile deployment arrangement assumed in the earlier calculation is unavailable during the required flood-period window. The analyst does not insert a guessed new probability.

The fixed-pump performance claim remains usable for its original conditions. The earlier F/M comparison remains an account of its earlier basis, but cannot support the present investment use. The exact mobile-deployment and consequence premises reopen; assistance, staged and other unclosed branches do not vanish. If a newly identified affected group changes the service meaning, the boundary question reopens as well.

The follow-up has returned an actionable distinction without making the board’s choice. Missed observation would instead leave a scoped gap; silence would not mean the premise remained valid.