Process Integration brings together the component subsystems into one system and ensures that the subsystems function together as one system. In information technology, systems integration is the process of linking together different computing systems and software applications physically or functionally. We synergize discrete systems utilizing a variety of techniques such as computer networking, PLCs, production machinery, enterprise application integration, business process management and custom software application development.
A system is an aggregation of subsystems cooperating so that the system is able to deliver the cross‐functionality. Systems integration involves integrating existing subsystems. The subsystems need 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. Systems 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.
In today’s connected world, the role of systems integration engineers is becoming more and more important: more and more systems are designed to connect together, both within the system under construction and to systems that are already deployed.
A systems integration engineer needs a broad range of skills and is likely to be defined by a breadth of knowledge rather than a depth of knowledge.
These skills include software and hardware engineering, interface protocols, and general problem solving skills. It is likely that the problems to be solved have not been solved before except in the broadest sense. They are likely to include new and challenging problems with an input from a broad range of engineers where the System Integration engineer 'pulls it all together'.