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Selected:ARID (Active Reviews for Intermediate Designs)Learning Review A3 Problem Solving 4Ls Retrospective

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	Operations Learning Review	Operations A3 Problem Solving	Agile 4Ls Retrospective
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.	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.	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	Medium	Medium	Medium	Low
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	1-3 h	45-90 min	45–75 min
Participantsdifferent	Designers, developers as users, and facilitation	3-10	2-5	Team members involved
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	Learning Review Notes, System Factors, Improvement Actions	A3 Report, Action Plan, Root Cause Analysis	4Ls Board, Learning Themes, Improvement Actions
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	LearningRetrospectiveIncidentOperations	LeanProblem solvingCoachingOperations	RetrospectiveLearningReflectionTeam

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