This is my expereince, a good PM manages expectations and pushes back on the builder from trying to forge ahead with construction when the staging isnt right or areas arent ready, instead of being yes men and cracking the whip to make tradies get things done to appease their superiors. And they will negotiate cross-trade eith other PM’s or tradies to see what arrangements will make mutliple parties happy when there are clashes and try keep things uninterrupted so everyone can keep ticking away at their own tasks.