View methods side by side.
Choose up to four methods. Add them using the search and share the comparison by copying its link.
| Criterion |  Operations Fault Tree Analysis |  Operations Failure Mode and Effects Analysis |  Operations After-Action Review |  Operations Fishbone Diagram |
|---|---|---|---|---|
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. | 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. | After missions or project phases with unclear outcomes, the method makes visible what actually happened and what can be learned from it. It separates course, effect, and causes so experience turns into solid improvement. | 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. |
Complexitydifferent | High | High | Low | Low |
Timedifferent | 2-6 h | 2-6 h | 20-45 min | 30-60 min |
Participantsdifferent | 3-8 | 3-10 | 3-12 | 2-8 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | FMEA Table, Risk Priority, Mitigation Actions | Lessons learned, Action items, Event summary | Fishbone Diagram, Cause Categories, Investigation Backlog |
Tagsno overlap | RiskRoot causeSafety | RiskQualityOperationsRoot cause | LearningOperationsImprovement | Root causeQualityOperations |