“The Congress directed CBO to review the modeling techniques that the military services use to generate their budget request for activities associated with operational readiness. CBO focused on identifying models used to inform the operating forces portion of the services’ base budgets for operation and maintenance. CBO included only those models used at the services’ headquarters. CBO found that:

• Models were used to inform about 67 percent ($53 billion) of the services’ $79 billion budget request for the active-duty component of operating forces in 2012,
• Operating forces (also known as budget activity 01) accounted for 14 percent of DoD’s $554 billion budget request in 2012, and Models are one of many inputs to the budgeting process.”