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Selected:ARID (Active Reviews for Intermediate Designs)A3 Problem Solving Barrier Analysis Kepner-Tregoe

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	Operations A3 Problem Solving	Operations Barrier Analysis	Operations Kepner-Tregoe
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 complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together.	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.
Complexitydifferent	Medium	Medium	Medium	High
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	45-90 min	2-4 h	2-8 h
Participantsdifferent	Designers, developers as users, and facilitation	2-5	2-6	2-8
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	A3 Report, Action Plan, Root Cause Analysis	Barrier Inventory, Failure Analysis per Barrier, Action Backlog	Problem Analysis, Decision Analysis, Risk Plan
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	LeanProblem solvingCoachingOperations	Root causeSafetyIncident	Problem solvingRoot causeDecisionOperations

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