Having spent many years as both an operator and layout designer of
control booths, I would advise getting to know each of the roles. Be
careful to observe how much light they have to work with under
working conditions, what workarounds they currently have in place and
especially, the moments when they need more than two hands. Find out
the best and worst stories: what causes a train wreck and what
careful choreography they pride themselves on when the time pressure
I've seen things like main power switches near people's feet, one
person asking another across the room to hit a button and audio
boards used as snack surfaces.
Don't assume that it's only about the displays.