The article explains how the 4+1 view—scenario, logical, development, process, and physical perspectives—helps architects create clear, verifiable system diagrams that address the concerns of business, development, operations, and testing teams, illustrated with an e‑commerce ordering example.
The logical view, the first and most intuitive part of the 4+1 view model, describes a system from a functional perspective, compares it with development, process, and physical views, defines core elements such as modules, responsibilities and relationships, outlines design principles, drawing steps, common pitfalls, and documentation templates.
This article introduces the 4+1 view model of software architecture, explaining its four main views—Logical, Process, Physical, Development—and the additional Scenario view, illustrating each with examples and diagrams to guide architects in comprehensive system design.
The article explains how to describe system architecture from various perspectives, introduces logical and physical views, presents the 5‑view method, and outlines six practical steps—from requirement analysis to architecture validation—guiding architects to create adaptable, scalable, and maintainable designs.
