During the course of their Air Force careers, Airmen sometimes switch jobs and receive multiple AFSCs to denote training in multiple specialties. A Primary AFSC (PAFSC) is the designation for the specialty in which the individual possesses the highest skill level and is, therefore, the AFSC that he or she is best qualified to perform. The Duty AFSC (DAFSC) reflects the actual manpower position the Airman is assigned to. The Control AFSC (CAFSC) is a management tool to make assignments, assist in determining training requirements, and consider individuals for promotion. Often an enlisted Airman's PAFSC will reflect a higher skill level than his or her CAFSC since the CAFSC skill level is tied to rank while the PAFSC skill level is tied to performance and education.