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Selected:ARID (Active Reviews for Intermediate Designs)4Ls Retrospective Blameless Postmortem Learning Review

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	Agile 4Ls Retrospective	DevOps Blameless Postmortem	Operations Learning Review
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 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.	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.
Complexitydifferent	Medium	Low	Medium	Medium
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	45–75 min	30-90 min	1-3 h
Participantsdifferent	Designers, developers as users, and facilitation	Team members involved	3-12	3-10
Formatdifferent	Workshop + async	Workshop	Workshop + async	Workshop
Outputdifferent	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	4Ls Board, Learning Themes, Improvement Actions	Postmortem Doc, Action Items, Timeline	Learning Review Notes, System Factors, Improvement Actions
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	RetrospectiveLearningReflectionTeam	Site Reliability EngineeringIncidentLearningReliability	LearningRetrospectiveIncidentOperations

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