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| Criterion |  UX Research User Interviews |  Decision Making Constraint Analysis |  Architecture C4 Model |
|---|---|---|---|
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. | When an initiative stalls, the limit often lies not in the idea but in hard or soft boundary conditions. Constraint Analysis separates these limits and shows which of them can actually be shaped. | The C4 Model makes a system legible across several resolution levels, from context down to code. It suits situations where different audiences need to understand the same architecture from different altitudes. |
Complexitysame | Low | Low | Low |
Timedifferent | 30–60 min per interview | 30-90 min | 1-4 h |
Participantsdifferent | 1 participant per interview | 2-8 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Constraint List, Hard/Soft Classification, Option Impact Notes, Decision Boundaries | Context Diagram, Container Diagram, Component Diagram |
Tagsno overlap | QualitativeResearchCustomerDiscovery | ConstraintsDecisionPlanningOptions | ArchitectureCommunicationVisualization |
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