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| Criterion |  Product Discovery Learning Card |  Operations 5 Whys |  Operations 8D Problem Solving |
|---|---|---|---|
Purposedifferent | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | 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. |
Complexitydifferent | Low | Low | High |
Timedifferent | 25-40 min | 15-30 min | 1-6 Wochen |
Participantsdifferent | 1-5 | 2-6 | 4-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Learning Card with evidence and next action | Root cause notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | ExperimentsValidationDiscoveryLearning | Root causeIncidentLeanProblem solving | QualityProblem solvingRoot cause |
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