that different functions formulate an "integrated system" if they are
combined in a way such that the result of each function reinforces the result
of others (see also "synergy") supporting the overall system's
functionality. Integrated systems exhibit high autonomy: to a large degree
provide by themselves the conditions required for their own performance,
reducing in this way dependence on external factors. The concept of
"integration", in this context, is closely related to the complex systems theory.