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| Criterion |  Operations 5 Whys |  Operations MORT Analysis |  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 a safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. | 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 | High | Medium |
Timedifferent | 15-30 min | Mehrere Tage bis Wochen | 1-4 h | 2-4 h |
Participantsdifferent | 2-6 | 2-6 | 2-8 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Root cause notes, Countermeasures | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations | Contradiction Statement, Inventive Principles, Solution Concepts | Family Tree Diagram, Pattern Notes, Systemic Measures |
Tagsno overlap | Root causeIncidentLeanProblem solving | Root causeSafetySystemicIncident | InnovationProblem solvingContradictionsCreativity | Root causePatternsIncidentSystemic |