Library / Problem Structuring and Decision Support Principles Framework
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PSD.15:10 - Rationale

The repertoire decision remains after Method identity, generic comparison, variant maintenance and set declaration have done their work. It asks which professional ways can help this practice structure problems and support decisions under actual participation, value, evidence, authority and follow-up conditions.

This is different from choosing a Method once. A future-use offering must preserve enough source, evidence, lineage and limits to survive transfer to another practitioner or engagement. It is also different from changing a culture: making a variant available does not establish the relations through which a community learns, enacts or retains it.

A changed premise can vindicate the incumbent’s stop rather than defeat the Method. That is why development starts with the recurring failure or opportunity and the affected claim, not the mere fact that a recommendation changed.