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Selected:Game Day ATAM (Architecture Tradeoff Analysis Method)Assumption Mapping Failure Mode and Effects Analysis

Criterion	DevOps Game Day	Architecture ATAM (Architecture Tradeoff Analysis Method)	Product Discovery Assumption Mapping	Operations Failure Mode and Effects Analysis
Purposedifferent	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.	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.	When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first.	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	High	High	Medium	High
Timedifferent	Halber Tag	Several meetings plus preparation and analysis; total effort depends on scope	45-60 min	2-6 h
Participantsdifferent	5-20	Evaluation team, architects, and relevant stakeholders	2-8	3-10
Formatdifferent	Workshop	Workshop + async	Workshop + async	Workshop
Outputdifferent	Simulation Notes, Gaps List, Updated Runbooks	Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations	Assumption map, Test backlog, Risk ranking	FMEA Table, Risk Priority, Mitigation Actions
Tagsno overlap	ResilienceOperationsIncident	ArchitectureQualityRiskTradeoffsStakeholders	AssumptionsRiskExperimentsValidation	RiskQualityOperationsRoot cause

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