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| Criterion |  Architecture arc42 |  UX Research User Interviews |  Product Discovery Opportunity Solution Tree |  Architecture C4 Model |
|---|---|---|---|---|
Purposedifferent | arc42 structures architecture knowledge so teams can document system, decisions, and risks consistently. The template builds a living understanding of the architecture instead of scattered notes. | 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 discovery keeps swinging between goals, ideas, and learning loops, it creates clear steering logic. It connects the desired outcome, opportunities, and experiments into a legible structure. | 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. |
Complexitydifferent | Low | Low | Medium | Low |
Timedifferent | 1-2 Tage | 30–60 min per interview | 1-2 h Setup, laufend | 1-4 h |
Participantsdifferent | 1-4 | 1 participant per interview | 2-6 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Architecture Document, Context View, Runtime View, Deployment View | Interview Notes, Themes, Insight Summary | Opportunity Solution Tree, Experiment Backlog, Learning Log | Context Diagram, Container Diagram, Component Diagram |
Tagsno overlap | ArchitectureDocumentationCommunication | QualitativeResearchCustomerDiscovery | DiscoveryOutcomesExperimentsOpportunity | ArchitectureCommunicationVisualization |