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| Criterion |  Engineering Hypothesis-Driven Troubleshooting |  Operations 8D Problem Solving |  Product Discovery Test Card |  Product Discovery Learning 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. | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | 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 | High | Low | Low |
Timedifferent | 30-240 min | 1-6 Wochen | 20-35 min | 25-40 min |
Participantsdifferent | 1-6 | 4-10 | 1-5 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Test Card with a pre-set threshold | Learning Card with evidence and next action |
Tagsno overlap | TroubleshootingProblem solvingDiagnosis | QualityProblem solvingRoot cause | ExperimentsValidationDiscoveryHypothesis | ExperimentsValidationDiscoveryLearning |