Library / Problem Structuring and Decision Support Principles Framework
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PSD.4:3 - Forces

ForceTension
ActionabilityA current cut is needed to proceed, while premature closure can reverse the result.
CompletenessWider scope can reveal consequences, while unlimited scope destroys affordability and accountability.
Explicit exclusionMaterial omissions must stay visible, while a boundary register should not become an encyclopedia.
Stability and revisionDependent work needs a current scope, while new evidence can legitimately reopen it.
Exact membershipExact contextual membership sometimes matters, while ordinary problem boundaries need not become U.Scope values.
AuthorityA boundary can inform later work, while it does not authorize the later decision or erase specialist jurisdiction.