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Selected:ARID (Active Reviews for Intermediate Designs)Learning Review 4Ls Retrospective After-Action Review

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	Operations Learning Review	Agile 4Ls Retrospective	Operations After-Action 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.	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.	After missions or project phases with unclear outcomes, the method makes visible what actually happened and what can be learned from it. It separates course, effect, and causes so experience turns into solid improvement.
Complexitydifferent	Medium	Medium	Low	Low
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	1-3 h	45–75 min	20-45 min
Participantsdifferent	Designers, developers as users, and facilitation	3-10	Team members involved	3-12
Formatdifferent	Workshop + async	Workshop	Workshop	Workshop + async
Outputdifferent	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	Learning Review Notes, System Factors, Improvement Actions	4Ls Board, Learning Themes, Improvement Actions	Lessons learned, Action items, Event summary
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	LearningRetrospectiveIncidentOperations	RetrospectiveLearningReflectionTeam	LearningOperationsImprovement

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