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| Criterion |  Operations A3 Problem Solving |  Operations Kepner-Tregoe |  Innovation TRIZ |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | 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 disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. | 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. |
Complexitydifferent | Medium | High | High | High |
Timedifferent | 45-90 min | 2-8 h | 1-4 h | 1-6 Wochen |
Participantsdifferent | 2-5 | 2-8 | 2-8 | 4-10 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Problem Analysis, Decision Analysis, Risk Plan | Contradiction Statement, Inventive Principles, Solution Concepts | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tags1 shared | LeanProblem solvingCoachingOperations | Problem solvingRoot causeDecisionOperations | InnovationProblem solvingContradictionsCreativity | QualityProblem solvingRoot cause |