Planning and scheduling are two separate activities. In Chapter 2, Planning the Project, you started the project planning. Here, you’ll think about scheduling and estimating the project. As you organize the schedule—and when you reestimate the work—you might have to modify the plan. That’s fine. Your original plan is just good enough to start. Expect to refine the plan as you schedule (and reschedule). And, don’t be afraid to refine the schedule as you replan.