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| Criterion |  Architecture Architecture Decision Record |  Growth A/B Testing |  Growth North Star Metric |
|---|---|---|---|
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 two variants compete, discussions quickly decide by taste rather than effect. A/B Testing checks behavior under controlled conditions and separates real improvement from chance or expectation effects. | When product teams track many metrics, the view of the actual customer outcome easily gets lost. A North Star Metric bundles growth, usage, and value contribution into one signal that makes the system's direction visible. |
Complexitydifferent | Low | High | Medium |
Timedifferent | 15-45 min | 1-4 Wochen | 1-2 h |
Participantsdifferent | 1-3 | 1-6 | 3-8 |
Formatdifferent | Async | Async | Workshop + async |
Outputdifferent | ADR File, Decision Log, Rationale | Experiment results, Decision log, Learning summary | North Star metric, Input metric tree, Measurement cadence |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | ExperimentsGrowthAnalyticsValidation | GrowthMetricsAlignmentRetention |
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