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| Criterion |  Engineering Fault Isolation |  Product Discovery Assumption Mapping |  Business Strategy Value Chain Analysis |  Product Discovery Riskiest Assumption Test |
|---|---|---|---|---|
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. | When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. | Value Chain Analysis shows where value is created, costs accrue, and differentiation becomes possible along the process. It compares strengths, risks, market logic, and courses of action. The result is captured as a value-chain map and lever list. | When an idea hinges on one critical unknown, it prioritizes testing that exact piece of uncertainty first. It separates problem, assumption, solution, and evidence. The result is captured as a prioritized list of assumptions, a test plan, and a result report. |
Complexitydifferent | Medium | Medium | High | Medium |
Timedifferent | 30-180 min | 45-60 min | Half day | 1-2 Wochen pro Iteration |
Participantsdifferent | 1-6 | 2-8 | 3-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Assumption map, Test backlog, Risk ranking | Value Chain Map, Lever List | Prioritized Assumption List, Test Plan, Results Report |
Tagsno overlap | TroubleshootingDiagnosisEngineering | AssumptionsRiskExperimentsValidation | StrategyBusiness modelDiagnosisAnalysis | ExperimentsValidationDiscoveryAssumptions |