The project planning process entails 21 of the 39 PMBOK processes.
The project plan is much more than a project schedule. It is an all-encompassing document used as the basis for project controlling and executing.
A project charter is not a project plan.
The WBS is not the project schedule.
The WBS serves as the foundation for most project-planning activities.
The WBS should include all the work of the project and should be developed with the project team.
The granularity of the WBS depends on what detail is needed for effective management and control.
Scope definition generates the WBS. Activity definition generates the activity list.
A project schedule must meet three key criteria to be complete: It must have buy-in, be achievable, ...