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| Criterion |  Innovation TRIZ |  Operations 8D Problem Solving |  Operations A3 Problem Solving |  Operations 5 Whys |
|---|---|---|---|---|
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 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 complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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. |
Complexitydifferent | High | High | Medium | Low |
Timedifferent | 1-4 h | 1-6 Wochen | 45-90 min | 15-30 min |
Participantsdifferent | 2-8 | 4-10 | 2-5 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Contradiction Statement, Inventive Principles, Solution Concepts | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | A3 Report, Action Plan, Root Cause Analysis | Root cause notes, Countermeasures |
Tags1 shared | InnovationProblem solvingContradictionsCreativity | QualityProblem solvingRoot cause | LeanProblem solvingCoachingOperations | Root causeIncidentLeanProblem solving |