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| Criterion |  Operations 8D Problem Solving |  Operations Kepner-Tregoe |  Operations Scatter Diagram |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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. | For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. | When the question is whether two measures are related, the method makes patterns in the data picture visible. It separates felt correlations from relationships that actually show up in the data. | 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. |
Complexitydifferent | High | High | Low | Low |
Timedifferent | 1-6 Wochen | 2-8 h | 30-90 min | 15-30 min |
Participantsdifferent | 4-10 | 2-8 | 1-4 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Problem Analysis, Decision Analysis, Risk Plan | Scatter Plot, Korrelationsnotiz, Hypothesenliste | Root cause notes, Countermeasures |
Tags1 shared | QualityProblem solvingRoot cause | Problem solvingRoot causeDecisionOperations | Root causeQualityVisualization | Root causeIncidentLeanProblem solving |