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| Criterion |  Operations Fault Tree Analysis |  Delivery Value Stream Mapping |  Operations Kepner-Tregoe |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
Purposedifferent | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | When delivery work dissolves into wait times, handoffs, and hidden effort, Value Stream Mapping makes the actual flow visible. The method exposes bottlenecks, idle time, and feedback loops so lead time and improvement levers become tangible. | For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. | 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 | High | Medium | High | High |
Timedifferent | 2-6 h | 1-3 h | 2-8 h | 2-6 h |
Participantsdifferent | 3-8 | 4-10 | 2-8 | 3-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Current-state map, Future-state map, Bottleneck list | Problem Analysis, Decision Analysis, Risk Plan | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | RiskRoot causeSafety | LeanFlowWasteDelivery | Problem solvingRoot causeDecisionOperations | RiskQualityOperationsRoot cause |