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| Criterion |  Operations Fault Tree Analysis |  Operations Fishbone Diagram |  Agile Bucket System |
|---|---|---|---|
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 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. | When a large batch of work needs a fast, rough estimate, it sorts items into predefined size buckets. It sorts work by value, risk, and delivery ability. The result is captured as a Bucketed Backlog, Relative Estimates, and Split Candidates. |
Complexitydifferent | High | Low | Medium |
Timedifferent | 2-6 h | 30-60 min | 30-90 min |
Participantsdifferent | 3-8 | 2-8 | 3-12 |
Formatdifferent | Workshop + async | Workshop | Workshop |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Fishbone Diagram, Cause Categories, Investigation Backlog | Bucketed Backlog, Relative Estimates, Split Candidates |
Tagsno overlap | RiskRoot causeSafety | Root causeQualityOperations | EstimationBacklogRelative sizing |
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