Editing Open systems architecture (section)

==Concept==
[[Systems design]] is a process of defining and engineering the architecture, methods, and interfaces necessary to accomplish a goal or fulfill a set of requirements. In open systems architecture, the design includes intentional provisions to make it possible to expand or modify the system at a later stage after initial operation. There is no one specific universal OSA, but it is essential the specific OSA applicable to a system is rigorously defined and documented.{{Sfnp|Sage|1992|pp=168–169}} For example, in information technology and telecommunication, such design principles lead to [[open system (computing)|open systems]].