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Selected:Design Studio Failure Mode and Effects Analysis Fault Tree Analysis ATAM (Architecture Tradeoff Analysis Method)

Criterion	UX Design Design Studio	Operations Failure Mode and Effects Analysis	Operations Fault Tree Analysis	Architecture ATAM (Architecture Tradeoff Analysis Method)
Purposedifferent	When several designs need to be quickly put in relation to each other, it makes ideas visible and comparable. It encourages early variants instead of long upfront debates.	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.	For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage.	ATAM helps teams weigh architecture decisions when quality goals compete. The team considers business goals, stakeholder expectations, and technical decisions together. The evaluation shows which risks need further investigation.
Complexitydifferent	Medium	High	High	High
Timedifferent	1-3 h	2-6 h	2-6 h	Several meetings plus preparation and analysis; total effort depends on scope
Participantsdifferent	3-8	3-10	3-8	Evaluation team, architects, and relevant stakeholders
Formatdifferent	Workshop	Workshop	Workshop + async	Workshop + async
Outputdifferent	Sketches, Concept Directions, Design Decisions	FMEA Table, Risk Priority, Mitigation Actions	Fault Tree, Critical Paths, Cause Hypotheses, Control Actions	Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations
Tagsno overlap	SketchingCollaborationIdeation	RiskQualityOperationsRoot cause	RiskRoot causeSafety	ArchitectureQualityRiskTradeoffsStakeholders

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