A system is a set of components that Interact to accomplish a goal ...
System Integration :
To select the appropriate components and the correct Interaction, connectivity and communications so that the
system can accomplish the required goals effectively and efficiently.
Emerging Properties of a System :
Properties that arise from the interaction of the system components but that are not characteristic of the individual
elements when they are not part of the system.
This is what originated the phrase: The system is more than the sum of its parts
When Integrating a production system the design pays attention to these emerging characteristics.