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Selected:ARID (Active Reviews for Intermediate Designs)Barrier Analysis Kepner-Tregoe Root Cause Analysis

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	Operations Barrier Analysis	Operations Kepner-Tregoe	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 disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations.	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.
Complexitydifferent	Medium	Medium	High	Medium
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	2-4 h	2-8 h	1-4 h
Participantsdifferent	Designers, developers as users, and facilitation	2-6	2-8	3-8
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	Barrier Inventory, Failure Analysis per Barrier, Action Backlog	Problem Analysis, Decision Analysis, Risk Plan	Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	Root causeSafetyIncident	Problem solvingRoot causeDecisionOperations	Root causeProblem solvingQualityIncident

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