Library / Problem Structuring and Decision Support Principles Framework
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PSD.10:8 - Common Anti-Patterns and How to Avoid Them

Anti-patternRepair
“Confidence is eighty percent.”Say whose judgement, about which proposition, under what evidence and probability interpretation.
Give three scenarios equal probability because three were drawn.Retain scenario-conditional claims until a distribution is justified.
Average incompatible model outputs.Locate the disputed proposition and keep the alternative assumptions or exact gap.
Discard uncertainty common to all candidates.Check whether it changes absolute admissibility or shows that all fail.
Commission more data without a decision question.State which possible answer could change the comparison or its use.
Replace missing holder evidence with another holder’s success.Request the exact transfer or applicability result; retain the blocker if it is unavailable.