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| Criterion |  Engineering Hypothesis-Driven Troubleshooting |  Product Discovery Hypothesis Prioritization Canvas |  Engineering Fault Isolation |  Product Discovery Test Card |
|---|---|---|---|---|
Purposedifferent | When systems fail unexpectedly, spontaneous attempts often produce more noise than insight. Hypothesis-driven Troubleshooting translates symptoms into testable assumptions and makes troubleshooting learnable. | When many hypotheses compete for attention, it brings order to their learning sequence and importance. It separates problem, assumption, solution, and evidence. The result is captured as a prioritization canvas and a hypothesis backlog. | 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. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | Medium | Medium | Medium | Low |
Timedifferent | 30-240 min | 60-90 min | 30-180 min | 20-35 min |
Participantsdifferent | 1-6 | 3-8 | 1-6 | 1-5 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary | Prioritization Canvas, Hypothesis Backlog | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Test Card with a pre-set threshold |
Tagsno overlap | TroubleshootingProblem solvingDiagnosis | ExperimentsPrioritizationDiscoveryHypothesis | TroubleshootingDiagnosisEngineering | ExperimentsValidationDiscoveryHypothesis |