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| Criterion |  Growth North Star Metric |  Product Discovery Test Card |  Growth Flywheel |
|---|---|---|---|
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. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | Growth often breaks down where a reinforcing mechanism builds up too much friction. A Flywheel shows the cycle of value, repetition, and reinforcement meant to sustain growth. |
Complexitydifferent | Medium | Low | Medium |
Timedifferent | 1-2 h | 20-35 min | 60-120 min |
Participantsdifferent | 3-8 | 1-5 | 3-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | North Star metric, Input metric tree, Measurement cadence | Test Card with a pre-set threshold | Flywheel Map, Friction Points, Growth Levers, Experiment Backlog |
Tagsno overlap | GrowthMetricsAlignmentRetention | ExperimentsValidationDiscoveryHypothesis | GrowthRetentionConversion |
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