MEP coordination drawings: who catches clashes before rough-in?

On tight jobs, the clash is never just one trade. Duct wants the same ceiling space as sprinkler, plumbing needs slope, electrical has panels and runs, then the ceiling height is already tight before anyone starts rough-in. Big projects have coordination meetings and drawings, but smaller jobs still end up solving too much in the field. That usually means someone is moving work that was already h…