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Selected:Fault Isolation ARID (Active Reviews for Intermediate Designs)Risk Storming Assumption Mapping

Criterion	Engineering Fault Isolation	Architecture ARID (Active Reviews for Intermediate Designs)	Architecture Risk Storming	Product Discovery Assumption Mapping
Purposedifferent	In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected.	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.	Helps clarify architecture context, options, and consequences in concrete terms. It organizes technical context, alternatives, and consequences. The result is captured as an Annotated Diagram, a Prioritized Risk List, and an Action Backlog.	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	30-180 min	2–4 h review as a planning range; preparation and evaluation additional	60-90 min	45-60 min
Participantsdifferent	1-6	Designers, developers as users, and facilitation	4-12	2-8
Formatdifferent	Workshop + async	Workshop + async	Workshop	Workshop + async
Outputdifferent	Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	Annotated Diagram, Prioritized Risk List, Action Backlog	Assumption map, Test backlog, Risk ranking
Tagsno overlap	TroubleshootingDiagnosisEngineering	ArchitectureEngineeringFeedbackValidationTasks	RiskArchitectureWorkshopValidation	AssumptionsRiskExperimentsValidation

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