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Selected:Fault Isolation8D Problem SolvingHypothesis-Driven TroubleshootingFailure Mode and Effects Analysis
| Criterion |  Engineering Fault Isolation |  Operations 8D Problem Solving |  Engineering Hypothesis-Driven Troubleshooting |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
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. | 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. | 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 a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. |
Complexitydifferent | Medium | High | Medium | High |
Timedifferent | 30-180 min | 1-6 Wochen | 30-240 min | 2-6 h |
Participantsdifferent | 1-6 | 4-10 | 1-6 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | TroubleshootingDiagnosisEngineering | QualityProblem solvingRoot cause | TroubleshootingProblem solvingDiagnosis | RiskQualityOperationsRoot cause |