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Selected:ARID (Active Reviews for Intermediate Designs)Assumption Mapping MORT Analysis Barrier Analysis

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	Product Discovery Assumption Mapping	Operations MORT Analysis	Operations Barrier Analysis
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 assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first.	For a safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps.	For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions.
Complexitydifferent	Medium	Medium	High	Medium
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	45-60 min	Mehrere Tage bis Wochen	2-4 h
Participantsdifferent	Designers, developers as users, and facilitation	2-8	2-6	2-6
Formatsame	Workshop + async	Workshop + async	Workshop + async	Workshop + async
Outputdifferent	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	Assumption map, Test backlog, Risk ranking	MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations	Barrier Inventory, Failure Analysis per Barrier, Action Backlog
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	AssumptionsRiskExperimentsValidation	Root causeSafetySystemicIncident	Root causeSafetyIncident

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