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Selected:ARID (Active Reviews for Intermediate Designs)Game Day Assumption Mapping Assumption Surfacing

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	DevOps Game Day	Product Discovery Assumption Mapping	Decision Making Assumption Surfacing
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.	In preparing for rare incidents, the method tests response capability under controlled conditions. It shows where assumptions about stability, roles, and recovery are too optimistic.	When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first.	Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it.
Complexitydifferent	Medium	High	Medium	Low
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	Halber Tag	45-60 min	45-90 min
Participantsdifferent	Designers, developers as users, and facilitation	5-20	2-8	2-8
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	Simulation Notes, Gaps List, Updated Runbooks	Assumption map, Test backlog, Risk ranking	Assumption List, Critical Assumptions, Learning Plan
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	ResilienceOperationsIncident	AssumptionsRiskExperimentsValidation	AssumptionsRiskDecisionDiscovery

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