Final answer:
Composite scores for an MOS are calculated when someone takes the ASVAB test or when MOS requirements change, often relating to enlistment or progression within the military.
Step-by-step explanation:
Composite scores for your military occupational specialty (MOS) are not computed on a regular schedule but are typically calculated when you take the Armed Services Vocational Aptitude Battery (ASVAB) test or when your MOS requirements are updated. The ASVAB is used to determine qualification for enlistment in the United States Armed Forces and to assign appropriate MOSs to recruits. If you're considering reclassification, reenlistment, or promotion, an updated composite score may be computed to reflect any changes in skills or aptitudes.