Software Architecture Document (4+1)
A software architecture document structured around the 4+1 views.
Each section corresponds to one of Kruchten's five views, providing a complete
architecture description from multiple perspectives. Based on the RUP Software
Architecture Document template.
Target Purposes: Designing, Informing
Available Formats: MarkdownFormat, HTMLFormat
Sections
1. Introduction & Architectural Goals
Purpose of the document, scope of the system, architectural goals
and constraints, and references to requirements driving the architecture.
2. Architectural Scenarios
Key use cases and scenarios that drive and validate the architecture.
Each scenario traces through the other four views, demonstrating how the
architecture supports the most important user goals.
3. Logical View
Functional decomposition — key abstractions, their responsibilities,
and relationships. Class diagrams, domain models, service interfaces,
or equivalent representations from the chosen modeling language.
4. Process View
Runtime behavior — processes, threads, communication mechanisms,
synchronization, and concurrency patterns. Activity diagrams, sequence
diagrams, or process models showing how the system handles load and
failure.
5. Development View
Software organization — modules, packages, layers, subsystems,
build structure, and team ownership. Component diagrams, package
diagrams, or repository/service boundaries.
6. Physical View
Deployment topology — mapping of software to hardware, nodes,
networks, availability zones, and resource allocation. Deployment
diagrams or infrastructure-as-code references.
7. Quality & Architectural Decisions
Cross-cutting quality attribute requirements, key architectural
decisions with rationale, and known trade-offs. References to ADRs
and quality attribute scenarios.
