Having a specification that allows for any system option and protocol leads to a more complex system, one that can be cumbersome to install, commission, and maintain. By picking one common protocol for an entire building control system, the costs go down and the maintainability goes up.

Having a specification that allows for any system option and protocol leads to a more complex system, one that is more cumbersome to install, commission, and maintain. It is recommended to pick one common protocol for the entire building control system infrastructure. Costs go down and maintainability goes up.