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Selected:ARID (Active Reviews for Intermediate Designs)Incident Timeline Analysis Root Cause Tree Analysis 5 Whys

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	DevOps Incident Timeline Analysis	Operations Root Cause Tree Analysis	Operations 5 Whys
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 an incident with an unclear sequence, the method makes the timeline precisely visible. It separates perception, reaction, and delay so cause and effect become more clearly readable.	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 single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description.
Complexitydifferent	Medium	Medium	Medium	Low
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	60-180 min	1-3 h	15-30 min
Participantsdifferent	Designers, developers as users, and facilitation	3-10	2-8	2-6
Formatdifferent	Workshop + async	Workshop + async	Workshop	Workshop
Outputdifferent	Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions	Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions	Cause Tree, Evidence Notes, Countermeasures	Root cause notes, Countermeasures
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	IncidentTimelineSite Reliability Engineering	Root causeTreeIncidentQuality	Root causeIncidentLeanProblem solving

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