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| Criterion |  Operations Change Analysis |  Innovation TRIZ |  Engineering Hypothesis-Driven Troubleshooting |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. | 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 systems fail unexpectedly, spontaneous attempts often produce more noise than insight. Hypothesis-driven Troubleshooting translates symptoms into testable assumptions and makes troubleshooting learnable. | 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 | Medium | High |
Timedifferent | 45-120 min | 1-4 h | 30-240 min | 1-6 Wochen |
Participantsdifferent | 2-6 | 2-8 | 1-6 | 4-10 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Contradiction Statement, Inventive Principles, Solution Concepts | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | InnovationProblem solvingContradictionsCreativity | TroubleshootingProblem solvingDiagnosis | QualityProblem solvingRoot cause |