What is the connection of a subsystem and a system?

A subsystem is a smaller, self-contained component that operates within a larger system, contributing to its overall functionality. While the system encompasses the complete set of processes and interactions, the subsystem focuses on specific tasks or functions that support the system's goals. The relationship is often hierarchical, with the subsystem relying on the system for context and resources, while also providing essential input that enhances the system's performance. This interdependence allows for more efficient organization and management of complex processes.