Relatively autonomous subsystems are also loosely coupled with other subsystems; that is. relatively few interfaces exist between the subsystems, and these interfaces are relatively simple. Decoupling techniques, which may be used to make subsystems relatively independent from one another by simplifying their interfaces,
Sum of the subsystems constitute the entire system
The process of decomposition is continued until smaller smallest subsystem are of manageable size. For example, in structuring an organization, decomposition stops when we reach units that are simple enough to manage as a whole.
Generally subsystem is one of the element of a supra system
Interfaces must be provided between the interacting subsystems.
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