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Selected:ARID (Active Reviews for Intermediate Designs)Learning Card 4Ls Retrospective Experiment Canvas

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	Product Discovery Learning Card	Agile 4Ls Retrospective	Product Discovery Experiment Canvas
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.	The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible.	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.	When experiments become unreadable after the fact, it arranges hypothesis, signal, and learning goal on a single canvas. It separates problem, assumption, solution, and evidence. The result is captured as a Completed Experiment Canvas and a Success Metric.
Complexitydifferent	Medium	Low	Low	Low
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	25-40 min	45–75 min	30-60 min
Participantsdifferent	Designers, developers as users, and facilitation	1-5	Team members involved	1-5
Formatdifferent	Workshop + async	Workshop + async	Workshop	Workshop + async
Outputdifferent	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	Learning Card with evidence and next action	4Ls Board, Learning Themes, Improvement Actions	Completed Experiment Canvas, Success Metric
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	ExperimentsValidationDiscoveryLearning	RetrospectiveLearningReflectionTeam	ExperimentsValidationDiscoveryHypothesis

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