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| Criterion |  Operations 8D Problem Solving |  Operations Fishbone Diagram |  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. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | 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 | Low | Low | Low |
Timedifferent | 1-6 Wochen | 30-60 min | 30-90 min | 15-30 min |
Participantsdifferent | 4-10 | 2-8 | 1-4 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Fishbone Diagram, Cause Categories, Investigation Backlog | Scatter Plot, Korrelationsnotiz, Hypothesenliste | Root cause notes, Countermeasures |
Tags1 shared | QualityProblem solvingRoot cause | Root causeQualityOperations | Root causeQualityVisualization | Root causeIncidentLeanProblem solving |