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| Criterion |  DevOps Blameless Postmortem |  Systems Thinking Iceberg Model |  Operations Learning Review |  Operations Family Tree Analysis |
|---|---|---|---|---|
Purposedifferent | After an incident with damage or a near miss, the method creates a sober field for learning without assigning blame. It directs attention to the course of events, conditions, and effective countermeasures. | The Iceberg Model separates visible events from patterns, structures, and mental models. This turns a single observation into a deeper understanding of why a problem keeps recurring. | 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 series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | 30-90 min | 30-60 min | 1-3 h | 2-4 h |
Participantsdifferent | 3-12 | 2-10 | 3-10 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Iceberg Worksheet, Pattern Notes, Intervention Ideas | Learning Review Notes, System Factors, Improvement Actions | Family Tree Diagram, Pattern Notes, Systemic Measures |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | Systems thinkingRoot causePatterns | LearningRetrospectiveIncidentOperations | Root causePatternsIncidentSystemic |