What is the concept of "modularity" in systems design?

The concept of "modularity" in systems design refers to designing a system in separate components or modules that can operate independently while still being able to work together as a cohesive whole. This approach allows for more manageable development and maintenance since each module can be developed, tested, and updated independently from the others. Modularity enhances flexibility in system design, making it easier to replace or upgrade individual components without affecting the entire system.

When systems are modular, it allows teams to work concurrently on different parts of the system, potentially speeding up the development process. Additionally, modular systems can promote reusability; once a module is created, it can be reused across different projects, thereby saving time and resources. This concept is foundational in software engineering, as it aligns with a structured approach to complex system design, leading to more robust, understandable, and scalable systems.