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| Criterion |  Engineering Fault Isolation |  Operations Fishbone Diagram |  Operations ALPEN Method |  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. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | With an overloaded day full of too many tasks, a realistic picture of the day emerges. The method connects estimating, deciding, and buffer thinking so planning fits available energy and time. | 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 | Low | Low | High |
Timedifferent | 30-180 min | 30-60 min | 10-20 min daily | 2-6 h |
Participantsdifferent | 1-6 | 2-8 | 1 | 3-10 |
Formatdifferent | Workshop + async | Workshop | Async | Workshop |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Fishbone Diagram, Cause Categories, Investigation Backlog | Daily Plan, Time Estimates, Review Notes | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | TroubleshootingDiagnosisEngineering | Root causeQualityOperations | PlanningTime managementProductivityOperations | RiskQualityOperationsRoot cause |