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| Criterion |  Engineering Fault Isolation |  Innovation Lean Startup |  Product Discovery Test Card |  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. | For uncertain business assumptions, the method forces the idea into contact with real market reactions early. It separates wishful picture, assumption, and observable behavior, so that learning becomes faster than planning. This translates uncertainty into measurable insight. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | Medium | Medium | Low | Low |
Timedifferent | 30-180 min | Wochen bis Monate je Lernzyklus | 20-35 min | 25-40 min |
Participantsdifferent | 1-6 | 2-8 | 1-5 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Hypothesis list, MVPs, Learning reports, Pivot or persevere decision | Test Card with a pre-set threshold | Learning Card with evidence and next action |
Tagsno overlap | TroubleshootingDiagnosisEngineering | LeanStartupValidationMVP | ExperimentsValidationDiscoveryHypothesis | ExperimentsValidationDiscoveryLearning |