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Criterion	Engineering Hypothesis-Driven Troubleshooting	Product Discovery Assumption Mapping	Operations Failure Mode and Effects Analysis	Operations Kepner-Tregoe
Purposedifferent	When systems fail unexpectedly, spontaneous attempts often produce more noise than insight. Hypothesis-driven Troubleshooting translates symptoms into testable assumptions and makes troubleshooting learnable.	When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first.	For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability.	For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations.
Complexitydifferent	Medium	Medium	High	High
Timedifferent	30-240 min	45-60 min	2-6 h	2-8 h
Participantsdifferent	1-6	2-8	3-10	2-8
Formatdifferent	Workshop + async	Workshop + async	Workshop	Workshop + async
Outputdifferent	Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary	Assumption map, Test backlog, Risk ranking	FMEA Table, Risk Priority, Mitigation Actions	Problem Analysis, Decision Analysis, Risk Plan
Tagsno overlap	TroubleshootingProblem solvingDiagnosis	AssumptionsRiskExperimentsValidation	RiskQualityOperationsRoot cause	Problem solvingRoot causeDecisionOperations