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| Criterion |  DevOps Blameless Postmortem |  Systems Thinking Iceberg Model |  DevOps Incident Command |  Operations After-Action Review |
|---|---|---|---|---|
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. | During an acute incident with several people involved, the method creates a clear leadership and communication structure. It reduces chaos when fast coordination and clean situational awareness are both needed at once. | After missions or project phases with unclear outcomes, the method makes visible what actually happened and what can be learned from it. It separates course, effect, and causes so experience turns into solid improvement. |
Complexitydifferent | Medium | Low | Medium | Low |
Timedifferent | 30-90 min | 30-60 min | As needed | 20-45 min |
Participantsdifferent | 3-12 | 2-10 | 4-15 | 3-12 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Iceberg Worksheet, Pattern Notes, Intervention Ideas | Incident Log, Action Tracker, Stakeholder Updates | Lessons learned, Action items, Event summary |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | Systems thinkingRoot causePatterns | IncidentOperationsReliability | LearningOperationsImprovement |