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| Criterion |  Operations Fishbone Diagram |  Operations 5 Whys |  Operations Change Analysis |
|---|---|---|---|
Purposedifferent | 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. | 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 a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. |
Complexitydifferent | Low | Low | Medium |
Timedifferent | 30-60 min | 15-30 min | 45-120 min |
Participantsdifferent | 2-8 | 2-6 | 2-6 |
Formatdifferent | Workshop | Workshop | Workshop + async |
Outputdifferent | Fishbone Diagram, Cause Categories, Investigation Backlog | Root cause notes, Countermeasures | Change Matrix, Cause Hypotheses, Validation Questions, Action List |
Tags1 shared | Root causeQualityOperations | Root causeIncidentLeanProblem solving | ChangeRoot causeTroubleshootingComparison |
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