A few months ago, this column covered the basics of developing effective control system sequences. You might recall that it discussed the process of how a designer needs to select and describe sequences that provided safe, reliable, and efficient control.
Once a sequence is developed it then needs to be properly implemented, a challenging task that falls to the controls contractor, but interpreting the sequence and programming the system is only one of their many tasks. First, they need to competitively bid and win the project, and then they go through the process of developing the controls submittals and installing the controllers, sensors, and actuators.