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| Criterion |  UX Research User Interviews |  Delivery Communication Plan |  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 many people need to be informed in parallel and messages would otherwise arrive unevenly or too late, a Communication Plan orders communication reliably. Channels, audiences, and cadences interlock so important information doesn't get lost. | 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 | 45-90 min | 1-4 h |
Participantsdifferent | 1 participant per interview | 2-6 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Communication Plan, Channel Matrix, Message Cadence | Context Diagram, Container Diagram, Component Diagram |
Tagsno overlap | QualitativeResearchCustomerDiscovery | CommunicationStakeholdersDeliveryPlanning | ArchitectureCommunicationVisualization |
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