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| Criterion |  Innovation TRIZ |  Operations 5 Whys |  Operations 8D Problem Solving |  Operations Root Cause Tree Analysis |
|---|---|---|---|---|
Purposedifferent | 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 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 an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. |
Complexitydifferent | High | Low | High | Medium |
Timedifferent | 1-4 h | 15-30 min | 1-6 Wochen | 1-3 h |
Participantsdifferent | 2-8 | 2-6 | 4-10 | 2-8 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Contradiction Statement, Inventive Principles, Solution Concepts | Root cause notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | InnovationProblem solvingContradictionsCreativity | Root causeIncidentLeanProblem solving | QualityProblem solvingRoot cause | Root causeTreeIncidentQuality |