Architectural diagrams

Architectural diagrams are visual maps, or blueprints, that show how a software system is put together. They highlight the key components, how they connect, and how information flows between them. You don’t necessarily need every tiny detail of the system. The value comes from seeing the structure clearly enough to understand the system, ask relevant questions, identify potential risks or gaps, and understand how changes and data might travel through the system. A helpful diagram makes the often invisible visible. It shows where the complexity lives, where bottlenecks might appear, and which parts of the system you’ll want to explore, test, or monitor more closely. A diagram can play an important role in understanding a system's testability. Whether the diagram is a simple sketch on a whiteboard in a meeting to help a discussion or decision, or a formal diagram in a tool, the goal is the same. A shared understanding of the system that supports teams making smarter quality and testing decisions.