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| Criterion |  UX Research User Interviews |  UX Research HEART Framework |  Engineering Goal Question Metric |  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 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. | 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. | 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 | 120 min initial, dann laufend | 90-180 min | 1-2 h |
Participantsdifferent | 1 participant per interview | 3-6 | 3-6 | 3-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | HEART-GSM Table, Dashboard | GQM Table, Metric Profiles | North Star metric, Input metric tree, Measurement cadence |
Tagsno overlap | QualitativeResearchCustomerDiscovery | MetricsUX researchMeasurementSatisfaction | MetricsMeasurementEngineeringAlignment | GrowthMetricsAlignmentRetention |