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Selected:Blameless Postmortem Fake Door Test ATAM (Architecture Tradeoff Analysis Method)Learning Card

Criterion	DevOps Blameless Postmortem	Product Discovery Fake Door Test	Architecture ATAM (Architecture Tradeoff Analysis Method)	Product Discovery Learning Card
Purposedifferent	After an incident with damage or a near miss, the method creates a sober field for learning without assigning blame. It directs attention to the course of events, conditions, and effective countermeasures.	When demand is still unclear, it measures interest in a feature before it is built. It separates real behavior from polite agreement and deliberately keeps build effort small.	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.	The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible.
Complexitydifferent	Medium	Medium	High	Low
Timedifferent	30-90 min	1-5 Tage	Several meetings plus preparation and analysis; total effort depends on scope	25-40 min
Participantsdifferent	3-12	Nutzertraffic	Evaluation team, architects, and relevant stakeholders	1-5
Formatdifferent	Workshop + async	Async	Workshop + async	Workshop + async
Outputdifferent	Postmortem Doc, Action Items, Timeline	Click Data, Interest Signal, Learning Decision	Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations	Learning Card with evidence and next action
Tagsno overlap	Site Reliability EngineeringIncidentLearningReliability	ValidationExperimentsDemandDiscovery	ArchitectureQualityRiskTradeoffsStakeholders	ExperimentsValidationDiscoveryLearning

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