Use existing organizational procedures and resources to fill out your project team through reassignment of internal resources whenever possible.
If there are still remaining staffing issues, develop a staffing plan to resolve them through:
Negotiating increased commitments from part-time team members
Team development of existing staff to build new skills
Procurement planning and external source selection to outsource work
Recruiting and hiring additional staff
Other methods for obtaining additional staff
If you cannot add needed staff in a timely manner, negotiate project changes to scope or timing that are consistent with the resources you have. Rely on planned overtime only as a last resort, and if you must do it, add it as a significant ...