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| Criterion |  UX Research User Interviews |  Architecture Architecture Decision Record |  Product Discovery Experiment Canvas |  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. | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. | When experiments become unreadable after the fact, it arranges hypothesis, signal, and learning goal on a single canvas. It separates problem, assumption, solution, and evidence. The result is captured as a Completed Experiment Canvas and a Success Metric. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitysame | Low | Low | Low | Low |
Timedifferent | 30–60 min per interview | 15-45 min | 30-60 min | 25-40 min |
Participantsdifferent | 1 participant per interview | 1-3 | 1-5 | 1-5 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | ADR File, Decision Log, Rationale | Completed Experiment Canvas, Success Metric | Learning Card with evidence and next action |
Tagsno overlap | QualitativeResearchCustomerDiscovery | ArchitectureRationaleDocumentationGovernance | ExperimentsValidationDiscoveryHypothesis | ExperimentsValidationDiscoveryLearning |