What life cycle will the plan follow? What project methodology?
Will we be modifying the standard approach? In what way?
What are the major project checkpoints, phase exits, stage gates, or milestones? What deliverables are required for these events?
If there are dependencies on multiple dependent projects, how will we identify, document, and agree upon the interfaces?
Where and when will we develop the project plan?
What software tools for project management will we use?
Who will use the tool for planning? Tracking?
What training do we require?
Who in addition to the project leader will be involved in planning?
What are the roles and responsibilities ...