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| Criterion |  DevOps Blameless Postmortem |  Systems Thinking Iceberg Model |  Operations 5 Whys |  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. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | 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 | Low | Medium |
Timedifferent | 30-90 min | 30-60 min | 15-30 min | 2-4 h |
Participantsdifferent | 3-12 | 2-10 | 2-6 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Iceberg Worksheet, Pattern Notes, Intervention Ideas | Root cause notes, Countermeasures | Family Tree Diagram, Pattern Notes, Systemic Measures |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | Systems thinkingRoot causePatterns | Root causeIncidentLeanProblem solving | Root causePatternsIncidentSystemic |