How Committed Are You and Your Team To Your Project

I know it's a crazy question and yet I'm going to guess that at least some of your project team aren't fully committed to the project. How do I know that?  They aren't performing, they aren't even really bought into what it is that you're doing on the project. If you or your team members aren't committed to the project, then how on earth can you expect to deliver on time, and on budget.