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| Criterion |  Operations 5 Whys |  Operations MORT Analysis |  Innovation TRIZ |  Operations Root Cause 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. | 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. |
Complexitydifferent | Low | High | High | Medium |
Timedifferent | 15-30 min | Mehrere Tage bis Wochen | 1-4 h | 1-4 h |
Participantsdifferent | 2-6 | 2-6 | 2-8 | 3-8 |
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 | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | Root causeIncidentLeanProblem solving | Root causeSafetySystemicIncident | InnovationProblem solvingContradictionsCreativity | Root causeProblem solvingQualityIncident |