These Project Teams are really empowered. Our functional management understands that when one of their people is assigned to a project team, you don't tell that person what to do. When they go to a project team meeting, they're empowered to make decisions. Puchlevic shared a few more truisms. Those who do the work, plan the work.
Every plan is an action plan.
Teamwork and consensus, but don't take too long. Don't confuse that with unanimity. Get on with it. Freedom to make mistakes, but correct mistakes early. Don't hide things.