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Selected:Fault Isolation Problem Interview Concierge MVP ARID (Active Reviews for Intermediate Designs)

Criterion	Engineering Fault Isolation	Product Discovery Problem Interview	Product Discovery Concierge MVP	Architecture ARID (Active Reviews for Intermediate Designs)
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.	When the picture of the problem still needs to become solid, it asks about real situations and consequences. It separates genuine suffering from mere interest in a solution.	When an idea can first fail or grow through genuine hands-on support, it relies on manual work instead of automation. It shows whether user value holds up even under manual execution.	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.
Complexitysame	Medium	Medium	Medium	Medium
Timedifferent	30-180 min	30-60 min je Interview	1-4 Wochen	2–4 h review as a planning range; preparation and evaluation additional
Participantsdifferent	1-6	5-12 Interviews	3-10 Kunden	Designers, developers as users, and facilitation
Formatsame	Workshop + async	Workshop + async	Workshop + async	Workshop + async
Outputdifferent	Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area	Problem Evidence, Risk Notes, Customer Segments	Concierge Learnings, Service Blueprint, MVP Risks	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions
Tagsno overlap	TroubleshootingDiagnosisEngineering	DiscoveryInterviewsValidation	MVPValidationServiceDiscovery	ArchitectureEngineeringFeedbackValidationTasks

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