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| Criterion |  UX Research User Interviews |  Engineering Goal Question Metric |  UX Research HEART Framework |  Growth North Star Metric |
|---|---|---|---|---|
Purposedifferent | When teams derive needs only from assumptions and real motives are missing, user interviews give direct access to behavior and meaning. Conversations from the target group's everyday life make patterns, tensions, and open questions solidly 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. | Helps clarify observations, needs, and patterns in concrete terms. It groups observations into patterns, questions, and decisions. The result is captured as a HEART-GSM table and dashboard. | 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 | Medium | Medium | Medium |
Timedifferent | 30–60 min per interview | 90-180 min | 120 min initial, dann laufend | 1-2 h |
Participantsdifferent | 1 participant per interview | 3-6 | 3-6 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | GQM Table, Metric Profiles | HEART-GSM Table, Dashboard | North Star metric, Input metric tree, Measurement cadence |
Tagsno overlap | QualitativeResearchCustomerDiscovery | MetricsMeasurementEngineeringAlignment | MetricsUX researchMeasurementSatisfaction | GrowthMetricsAlignmentRetention |