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

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	Operations Root Cause Analysis	Engineering Fault Isolation	Operations Root Cause Tree 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 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.	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.	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.
Complexitysame	Medium	Medium	Medium	Medium
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	1-4 h	30-180 min	1-3 h
Participantsdifferent	Designers, developers as users, and facilitation	3-8	1-6	2-8
Formatdifferent	Workshop + async	Workshop + async	Workshop + async	Workshop
Outputdifferent	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan	Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area	Cause Tree, Evidence Notes, Countermeasures
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	Root causeProblem solvingQualityIncident	TroubleshootingDiagnosisEngineering	Root causeTreeIncidentQuality

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