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Selected:ARID (Active Reviews for Intermediate Designs)Starfish Retrospective Experiment Canvas Test Card

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	Agile Starfish Retrospective	Product Discovery Experiment Canvas	Product Discovery Test Card
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 improvement options need to be sorted more finely than just start and stop, it brings observations into clear kinds of action. This makes visible what should be done more, less, newly, or continued.	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.	The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success.
Complexitydifferent	Medium	Low	Low	Low
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	45-90 min	30-60 min	20-35 min
Participantsdifferent	Designers, developers as users, and facilitation	4-12	1-5	1-5
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	Starfish Board, Practice Changes, Experiments	Completed Experiment Canvas, Success Metric	Test Card with a pre-set threshold
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	RetrospectiveImprovementExperimentsTeam	ExperimentsValidationDiscoveryHypothesis	ExperimentsValidationDiscoveryHypothesis

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