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Selected:ARID (Active Reviews for Intermediate Designs)Pirate Metrics AARRRNorth Star MetricSmoke Test
| Criterion |  Architecture ARID (Active Reviews for Intermediate Designs) |  Growth Pirate Metrics AARRR |  Growth North Star Metric |  Product Discovery Smoke Test |
|---|---|---|---|---|
Purposedifferent | ARID examines how well developers can work with a technical design. It focuses on a part of the system that can still be revised, between the architecture overview and the detailed specification. | For products with complex usage paths, overall growth alone is too coarse to reveal bottlenecks. Pirate Metrics breaks the relationship with the product into consecutive stages and shows where the funnel actually leaks. | 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. | When demand only needs to be roughly verified, it tests interest with minimal effort. It measures whether people would take a next step at all. |
Complexitydifferent | Medium | Medium | Medium | Low |
Timedifferent | 2–4 h review as a planning range; preparation and evaluation additional | 1-2 h Setup, laufend | 1-2 h | 1-5 Tage |
Participantsdifferent | Designers, developers as users, and facilitation | 2-8 | 3-8 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | AARRR funnel, Metric baseline, Experiment backlog | North Star metric, Input metric tree, Measurement cadence | Interest Metrics, Conversion Signal, Learning Note |
Tagsno overlap | ArchitectureEngineeringFeedbackValidationTasks | GrowthMetricsExperiments | GrowthMetricsAlignmentRetention | ValidationExperimentsDemandGrowth |