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| Criterion |  DevOps Blameless Postmortem |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Agile 4Ls Retrospective |
|---|---|---|---|
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. | ATAM helps teams weigh architecture decisions when quality goals compete. The team considers business goals, stakeholder expectations, and technical decisions together. The evaluation shows which risks need further investigation. | 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 | Medium | High | Low |
Timedifferent | 30-90 min | Several meetings plus preparation and analysis; total effort depends on scope | 45–75 min |
Participantsdifferent | 3-12 | Evaluation team, architects, and relevant stakeholders | Team members involved |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | ArchitectureQualityRiskTradeoffsStakeholders | RetrospectiveLearningReflectionTeam |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
