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| Criterion |  Engineering Fault Isolation |  Growth A/B Testing |  Product Discovery Test 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. | When two variants compete, discussions quickly decide by taste rather than effect. A/B Testing checks behavior under controlled conditions and separates real improvement from chance or expectation effects. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | Medium | High | Low |
Timedifferent | 30-180 min | 1-4 Wochen | 20-35 min |
Participantsdifferent | 1-6 | 1-6 | 1-5 |
Formatdifferent | Workshop + async | Async | Workshop + async |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Experiment results, Decision log, Learning summary | Test Card with a pre-set threshold |
Tagsno overlap | TroubleshootingDiagnosisEngineering | ExperimentsGrowthAnalyticsValidation | ExperimentsValidationDiscoveryHypothesis |
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