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| Criterion |  Engineering Fault Isolation |  Decision Making Decision Tree |  Product Discovery Assumption Mapping |  Product Discovery MVP Test Matrix |
|---|---|---|---|---|
Purposedifferent | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | For decisions with follow-on paths and dependencies, a linear comparison is often not enough. A Decision Tree shows how options branch under conditions and which consequences hang on each branch. | When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. | When several minimal variants compete to answer the same question, it makes comparing and choosing between them cleaner. It separates problem, assumption, solution, and evidence. The result is captured as a Test Matrix and a Test Plan. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | 30-180 min | 30-90 min | 45-60 min | 45-75 min |
Participantsdifferent | 1-6 | 1-6 | 2-8 | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Decision Tree, Option Map, Assumption List | Assumption map, Test backlog, Risk ranking | Test Matrix, Test Plan |
Tagsno overlap | TroubleshootingDiagnosisEngineering | DecisionTreeOptions | AssumptionsRiskExperimentsValidation | ExperimentsValidationDiscoveryOptions |