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| Criterion |  UX Research User Interviews |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Product Discovery Fake Door Test |  Product Discovery Learning Card |
|---|---|---|---|---|
Purposedifferent | When teams derive needs only from assumptions and real motives are missing, user interviews give direct access to behavior and meaning. Conversations from the target group's everyday life make patterns, tensions, and open questions solidly visible. | 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 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. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | Low | High | Medium | Low |
Timedifferent | 30–60 min per interview | Several meetings plus preparation and analysis; total effort depends on scope | 1-5 Tage | 25-40 min |
Participantsdifferent | 1 participant per interview | Evaluation team, architects, and relevant stakeholders | Nutzertraffic | 1-5 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Click Data, Interest Signal, Learning Decision | Learning Card with evidence and next action |
Tagsno overlap | QualitativeResearchCustomerDiscovery | ArchitectureQualityRiskTradeoffsStakeholders | ValidationExperimentsDemandDiscovery | ExperimentsValidationDiscoveryLearning |