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Selected:ARID (Active Reviews for Intermediate Designs)Barrier Analysis Root Cause Tree Analysis Root Cause Analysis

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	Operations Barrier Analysis	Operations Root Cause Tree Analysis	Operations Root Cause 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.	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.	For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie.	When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another.
Complexitysame	Medium	Medium	Medium	Medium
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	2-4 h	1-3 h	1-4 h
Participantsdifferent	Designers, developers as users, and facilitation	2-6	2-8	3-8
Formatdifferent	Workshop + async	Workshop + async	Workshop	Workshop + async
Outputdifferent	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	Barrier Inventory, Failure Analysis per Barrier, Action Backlog	Cause Tree, Evidence Notes, Countermeasures	Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	Root causeSafetyIncident	Root causeTreeIncidentQuality	Root causeProblem solvingQualityIncident

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