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Selected:C4 Model Fault Isolation Architecture Decision Record ARID (Active Reviews for Intermediate Designs)

Criterion	Architecture C4 Model	Engineering Fault Isolation	Architecture Architecture Decision Record	Architecture ARID (Active Reviews for Intermediate Designs)
Purposedifferent	The C4 Model makes a system legible across several resolution levels, from context down to code. It suits situations where different audiences need to understand the same architecture from different altitudes.	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.	An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable.	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.
Complexitydifferent	Low	Medium	Low	Medium
Timedifferent	1-4 h	30-180 min	15-45 min	2–4 h review as a planning range; preparation and evaluation additional
Participantsdifferent	1-5	1-6	1-3	Designers, developers as users, and facilitation
Formatdifferent	Workshop + async	Workshop + async	Async	Workshop + async
Outputdifferent	Context Diagram, Container Diagram, Component Diagram	Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area	ADR File, Decision Log, Rationale	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions
Tagsno overlap	ArchitectureCommunicationVisualization	TroubleshootingDiagnosisEngineering	ArchitectureRationaleDocumentationGovernance	ArchitectureEngineeringFeedbackValidationTasks

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