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| Criterion |  Operations Fault Tree Analysis |  Operations Learning Review |  Operations Barrier Analysis |  Agile 4Ls Retrospective |
|---|---|---|---|---|
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. | After a project phase with mixed results, the method makes learning from the individual case reusable. It connects events, decisions, and systemic conditions into robust insights. | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | When a sprint should not only be assessed but also learned from, it captures experience in clear learning categories. It records what worked, what's missing, and what should run differently next time. |
Complexitydifferent | High | Medium | Medium | Low |
Timedifferent | 2-6 h | 1-3 h | 2-4 h | 45–75 min |
Participantsdifferent | 3-8 | 3-10 | 2-6 | Team members involved |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Learning Review Notes, System Factors, Improvement Actions | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | RiskRoot causeSafety | LearningRetrospectiveIncidentOperations | Root causeSafetyIncident | RetrospectiveLearningReflectionTeam |