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

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	Engineering Fault Isolation	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.	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.	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	30-180 min	1-3 h	1-4 h
Participantsdifferent	Designers, developers as users, and facilitation	1-6	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	Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area	Cause Tree, Evidence Notes, Countermeasures	Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	TroubleshootingDiagnosisEngineering	Root causeTreeIncidentQuality	Root causeProblem solvingQualityIncident

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