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Selected:ARID (Active Reviews for Intermediate Designs)8D Problem Solving 5 Whys Root Cause Tree Analysis

Criterion	Architecture ARID (Active Reviews for Intermediate Designs)	Operations 8D Problem Solving	Operations 5 Whys	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.	For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly.	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.	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.
Complexitydifferent	Medium	High	Low	Medium
Timedifferent	2–4 h review as a planning range; preparation and evaluation additional	1-6 Wochen	15-30 min	1-3 h
Participantsdifferent	Designers, developers as users, and facilitation	4-10	2-6	2-8
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	8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan	Root cause notes, Countermeasures	Cause Tree, Evidence Notes, Countermeasures
Tagsno overlap	ArchitectureEngineeringFeedbackValidationTasks	QualityProblem solvingRoot cause	Root causeIncidentLeanProblem solving	Root causeTreeIncidentQuality

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