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| Criterion |  Operations 8D Problem Solving |  Operations Scatter Diagram |  Operations Root Cause Analysis |  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 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. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. | 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 | Medium | Low |
Timedifferent | 1-6 Wochen | 30-90 min | 1-4 h | 15-30 min |
Participantsdifferent | 4-10 | 1-4 | 3-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Scatter Plot, Korrelationsnotiz, Hypothesenliste | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Root cause notes, Countermeasures |
Tags1 shared | QualityProblem solvingRoot cause | Root causeQualityVisualization | Root causeProblem solvingQualityIncident | Root causeIncidentLeanProblem solving |