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| Criterion |  Growth North Star Metric |  Engineering Goal Question Metric |  Product Discovery Test Card |
|---|---|---|---|
Purposedifferent | 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. | Helps clarify technical problems, hypotheses, and next steps in concrete terms. It breaks a technical problem into testable parts. The result is captured as a GQM table and metric briefs. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | Medium | Medium | Low |
Timedifferent | 1-2 h | 90-180 min | 20-35 min |
Participantsdifferent | 3-8 | 3-6 | 1-5 |
Formatdifferent | Workshop + async | Workshop | Workshop + async |
Outputdifferent | North Star metric, Input metric tree, Measurement cadence | GQM Table, Metric Profiles | Test Card with a pre-set threshold |
Tagsno overlap | GrowthMetricsAlignmentRetention | MetricsMeasurementEngineeringAlignment | ExperimentsValidationDiscoveryHypothesis |
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