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Selected:ARID (Active Reviews for Intermediate Designs)Gemba WalkBlameless PostmortemA3 Problem Solving
| Criterion |  Architecture ARID (Active Reviews for Intermediate Designs) |  Operations Gemba Walk |  DevOps Blameless Postmortem |  Operations A3 Problem Solving |
|---|---|---|---|---|
Purposedifferent | 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. | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. | 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. | 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. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | 2–4 h review as a planning range; preparation and evaluation additional | 30-120 min | 30-90 min | 45-90 min |
Participantsdifferent | Designers, developers as users, and facilitation | 2-6 | 3-12 | 2-5 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | Observation Notes, Improvement Ideas | Postmortem Doc, Action Items, Timeline | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | ArchitectureEngineeringFeedbackValidationTasks | LeanObservationProcessOperations | Site Reliability EngineeringIncidentLearningReliability | LeanProblem solvingCoachingOperations |