System Architecture is a conceptual blueprint that defines the structure and behavior of a system. An architecture description is a formal description and representation of a system, organized in a way that supports reasoning about the structures and behaviors of the system.
It includes a variety of viewpoints and perspectives, considering both software and hardware components, and it also addresses the interaction between these components.
This concept is crucial in areas of system design and software engineering, and it serves as a guideline for system design, implementation, and integration, and also for system maintenance and evolution.