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| Criterion |  Agile Three Amigos |  Operations Fault Tree Analysis |  Operations Root Cause Tree Analysis |
|---|---|---|---|
Purposedifferent | When story, test, and implementation could drift apart, it brings business perspective, engineering, and quality together early. It prevents a story from being read differently only late in the process. | 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 problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. |
Complexitydifferent | Low | High | Medium |
Timedifferent | 15-30 min | 2-6 h | 1-3 h |
Participantsdifferent | 3 | 3-8 | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Clarified Story, Test Examples, Open Questions | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | CollaborationBehavior-Driven DevelopmentQualityRefinement | RiskRoot causeSafety | Root causeTreeIncidentQuality |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
