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| Criterion |  Architecture Architecture Decision Record |  Product Discovery Experiment Canvas |  Product Discovery Test Card |  Product Discovery Learning Card |
|---|---|---|---|---|
Purposedifferent | 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 Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | 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 | 15-45 min | 30-60 min | 20-35 min | 25-40 min |
Participantsdifferent | 1-3 | 1-5 | 1-5 | 1-5 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | ADR File, Decision Log, Rationale | Completed Experiment Canvas, Success Metric | Test Card with a pre-set threshold | Learning Card with evidence and next action |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | ExperimentsValidationDiscoveryHypothesis | ExperimentsValidationDiscoveryHypothesis | ExperimentsValidationDiscoveryLearning |