Sit through enough coordination meetings on a big commercial or industrial job and you'll notice the pattern before anyone says it out loud. Mechanical presents first. Sheet metal walks through their routing. Plumbing gets its slot. And electrical sits at the end of the table, waiting for everyone else to finish claiming the ceiling space before they can even finalize where the conduit racks go — on a system that, unlike a rigid duct run or a sloped pipe, can actually move around almost anything in the room.
Then the job hits the floor, and the pattern repeats. Mechanical spools ship. Duct packages stage. And electrical is still back at the shop trying to figure out which prefab rack goes out next, because the tracking system everyone bought was built for spools and duct, and electrical got whatever was left over — usually a job number and a due date, and nothing that actually understands a pull sheet.