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Selected:ARID (Active Reviews for Intermediate Designs)Game Day Root Cause Tree Analysis Failure Mode and Effects Analysis

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	DevOps Game Day	Operations Root Cause Tree Analysis	Operations Failure Mode and Effects 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 preparing for rare incidents, the method tests response capability under controlled conditions. It shows where assumptions about stability, roles, and recovery are too optimistic.	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.	For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability.
Complexitydifferent	Medium	High	Medium	High
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	Halber Tag	1-3 h	2-6 h
Participantsdifferent	Designers, developers as users, and facilitation	5-20	2-8	3-10
Formatdifferent	Workshop + async	Workshop	Workshop	Workshop
Outputdifferent	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	Simulation Notes, Gaps List, Updated Runbooks	Cause Tree, Evidence Notes, Countermeasures	FMEA Table, Risk Priority, Mitigation Actions
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	ResilienceOperationsIncident	Root causeTreeIncidentQuality	RiskQualityOperationsRoot cause

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