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| Criterion |  Operations 5 Whys |  Innovation TRIZ |  Operations Family Tree Analysis |
|---|---|---|---|
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. | For technical contradictions or trade-offs, the method looks for solutions that resolve opposing requirements at the same time. It translates limits into an explicit picture of conflict that becomes workable. This produces not just compromises but more elegant principles. | 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. |
Complexitydifferent | Low | High | Medium |
Timedifferent | 15-30 min | 1-4 h | 2-4 h |
Participantsdifferent | 2-6 | 2-8 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Root cause notes, Countermeasures | Contradiction Statement, Inventive Principles, Solution Concepts | Family Tree Diagram, Pattern Notes, Systemic Measures |
Tagsno overlap | Root causeIncidentLeanProblem solving | InnovationProblem solvingContradictionsCreativity | Root causePatternsIncidentSystemic |
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