System integration is the bringing together of the component
subsystems into one system and ensuring that the subsystems function together as a system. In information technology, systems integration is the process of linking together different computing systems and software applications physically or functionally. The systems integrator brings together discrete systems utilizing a variety of techniques such as
computer networking,
enterprise application integration,
business process management or manual
programming. A system is an aggregation of subsystems cooperating so that the system is able to deliver the over-arching functionality. System integration involves integrating existing (often disparate) subsystems. The subsystems will have interfaces. Integration involves joining the subsystems together by “gluing” their interfaces together. If the interfaces don’t directly interlock, the “glue” between them can provide the required mappings. System integration is about determining the required “glue”. System integration is also about value-adding to the system, capabilities that are possible because of interactions between subsystems.
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The progressive linking and testing of
system components to merge their functional and technical characteristics into a comprehensive, interoperable system. Note: Integration of
data systems allows data existing on disparate systems to be shared or accessed across functional or system boundaries.
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