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Selected:Riskiest Assumption Test ARID (Active Reviews for Intermediate Designs)Test Card Assumption Mapping

Criterion	Product Discovery Riskiest Assumption Test	Architecture ARID (Active Reviews for Intermediate Designs)	Product Discovery Test Card	Product Discovery Assumption Mapping
Purposedifferent	When an idea hinges on one critical unknown, it prioritizes testing that exact piece of uncertainty first. It separates problem, assumption, solution, and evidence. The result is captured as a prioritized list of assumptions, a test plan, and a result report.	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 Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success.	When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first.
Complexitydifferent	Medium	Medium	Low	Medium
Timedifferent	1-2 Wochen pro Iteration	2–4 h review as a planning range; preparation and evaluation additional	20-35 min	45-60 min
Participantsdifferent	2-6	Designers, developers as users, and facilitation	1-5	2-8
Formatsame	Workshop + async	Workshop + async	Workshop + async	Workshop + async
Outputdifferent	Prioritized Assumption List, Test Plan, Results Report	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	Test Card with a pre-set threshold	Assumption map, Test backlog, Risk ranking
Tags1 shared	ExperimentsValidationDiscoveryAssumptions	ArchitectureEngineeringFeedbackValidationTasks	ExperimentsValidationDiscoveryHypothesis	AssumptionsRiskExperimentsValidation

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