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| Criterion |  Operations Change Analysis |  Innovation TRIZ |  Engineering Fault Isolation |  Engineering Hypothesis-Driven Troubleshooting |
|---|---|---|---|---|
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. | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | When systems fail unexpectedly, spontaneous attempts often produce more noise than insight. Hypothesis-driven Troubleshooting translates symptoms into testable assumptions and makes troubleshooting learnable. |
Complexitydifferent | Medium | High | Medium | Medium |
Timedifferent | 45-120 min | 1-4 h | 30-180 min | 30-240 min |
Participantsdifferent | 2-6 | 2-8 | 1-6 | 1-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Contradiction Statement, Inventive Principles, Solution Concepts | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | InnovationProblem solvingContradictionsCreativity | TroubleshootingDiagnosisEngineering | TroubleshootingProblem solvingDiagnosis |