Subsystem Usage ◆ Subsystems can be used to partition the system into parts that can be independently: -ordered,configured,or delivered developed,as long as the interfaces remain unchanged deployed across a set of distributed computational nodes changed without breaking other parts of the systems ◆ Subsystems can also be used to: partition the system into units which can provide restricted security over key resources represent existing products or external systems in the design (e.g.components) Subsystems raise the level of abstraction Object Oriented Analysis and Design 9Object Oriented Analysis and Design 9 Subsystems raise the level of abstraction Subsystem Usage  Subsystems can be used to partition the system into parts that can be independently: ▪ ordered, configured, or delivered ▪ developed, as long as the interfaces remain unchanged ▪ deployed across a set of distributed computational nodes ▪ changed without breaking other parts of the systems  Subsystems can also be used to: ▪ partition the system into units which can provide restricted security over key resources ▪ represent existing products or external systems in the design (e.g. components)