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| Criterion |  Engineering Fault Isolation |  Decision Making Assumption Surfacing |  Product Discovery Riskiest Assumption Test |  Product Discovery Learning Card |
|---|---|---|---|---|
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. | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | 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. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | Medium | Low | Medium | Low |
Timedifferent | 30-180 min | 45-90 min | 1-2 Wochen pro Iteration | 25-40 min |
Participantsdifferent | 1-6 | 2-8 | 2-6 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Assumption List, Critical Assumptions, Learning Plan | Prioritized Assumption List, Test Plan, Results Report | Learning Card with evidence and next action |
Tagsno overlap | TroubleshootingDiagnosisEngineering | AssumptionsRiskDecisionDiscovery | ExperimentsValidationDiscoveryAssumptions | ExperimentsValidationDiscoveryLearning |