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| Criterion |  Engineering Fault Isolation |  Engineering Hypothesis-Driven Troubleshooting |  Systems Thinking Future Reality Tree |  Systems Thinking Leverage Points |
|---|---|---|---|---|
Purposedifferent | 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. | A Future Reality Tree shows how desired actions are meant to lead to a better system state. The method checks whether a path of change holds together logically before time flows into implementation. | Leverage Points show exactly where interventions in a system produce a disproportionate effect. It draws relationships, patterns, and feedback loops. The result is captured as a leverage map and action strategy. |
Complexitydifferent | Medium | Medium | High | High |
Timedifferent | 30-180 min | 30-240 min | 2-4 h | Half day |
Participantsdifferent | 1-6 | 1-6 | 3-8 | 3-12 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | Leverage Map, Action Strategy |
Tagsno overlap | TroubleshootingDiagnosisEngineering | TroubleshootingProblem solvingDiagnosis | Theory of ConstraintsSystems thinkingChange | Systems thinkingChangeStrategy |