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| Criterion |  Operations 5 Whys |  Operations ABC Analysis |  Operations Family Tree Analysis |  Operations Kepner-Tregoe |
|---|---|---|---|---|
Purposedifferent | 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. | With many similar objects of differing economic significance, the method prioritizes effort by effect. It separates what needs regular steering from what rarely needs attention. | For a series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. | 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. |
Complexitydifferent | Low | Low | Medium | High |
Timedifferent | 15-30 min | 30-60 min | 2-4 h | 2-8 h |
Participantsdifferent | 2-6 | 1-5 | 2-6 | 2-8 |
Formatdifferent | Workshop | Async | Workshop + async | Workshop + async |
Outputdifferent | Root cause notes, Countermeasures | ABC Classification, Focus Rules, Control List | Family Tree Diagram, Pattern Notes, Systemic Measures | Problem Analysis, Decision Analysis, Risk Plan |
Tagsno overlap | Root causeIncidentLeanProblem solving | PrioritizationOperationsPortfolio | Root causePatternsIncidentSystemic | Problem solvingRoot causeDecisionOperations |