The idea of tying various systems together is the basis for smart/intelligent buildings and has been the evolution of the master systems integration concept.
ASHRAE Guideline 36 gives specifying engineers a chance to deliver a better project specification but only if they pay attention to the details and communicate them to the project team.
If industry outsiders were to add up all the promotional claims related to the energy performance of building systems and associated energy savings, they could reasonably think that our industry has achieved maximum energy savings and that there is no building system left to improve upon.
Fortunately, thanks to a flood of innovation in the building control space, you can find individual solutions that are affordable and easy to set up without professionals.