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Selected:Blameless PostmortemARID (Active Reviews for Intermediate Designs)A3 Problem SolvingLearning Review
| Criterion |  DevOps Blameless Postmortem |  Architecture ARID (Active Reviews for Intermediate Designs) |  Operations A3 Problem Solving |  Operations Learning 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. | ARID examines how well developers can work with a technical design. It focuses on a part of the system that can still be revised, between the architecture overview and the detailed specification. | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | 30-90 min | 2–4 h review as a planning range; preparation and evaluation additional | 45-90 min | 1-3 h |
Participantsdifferent | 3-12 | Designers, developers as users, and facilitation | 2-5 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | A3 Report, Action Plan, Root Cause Analysis | Learning Review Notes, System Factors, Improvement Actions |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | ArchitectureEngineeringFeedbackValidationTasks | LeanProblem solvingCoachingOperations | LearningRetrospectiveIncidentOperations |