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| Criterion |  Innovation TRIZ |  DevOps Blameless Postmortem |  Operations Learning Review |  Agile 4Ls Retrospective |
|---|---|---|---|---|
Purposedifferent | For technical contradictions or trade-offs, the method looks for solutions that resolve opposing requirements at the same time. It translates limits into an explicit picture of conflict that becomes workable. This produces not just compromises but more elegant principles. | 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. | 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. | 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 | 1-4 h | 30-90 min | 1-3 h | 45–75 min |
Participantsdifferent | 2-8 | 3-12 | 3-10 | Team members involved |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Contradiction Statement, Inventive Principles, Solution Concepts | Postmortem Doc, Action Items, Timeline | Learning Review Notes, System Factors, Improvement Actions | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | InnovationProblem solvingContradictionsCreativity | Site Reliability EngineeringIncidentLearningReliability | LearningRetrospectiveIncidentOperations | RetrospectiveLearningReflectionTeam |