A description of the operation of one computerized Weapon System Cost Model used to determine resource requirements for individual weapon systems consisting of either aircraft, aircraft and ASMs, or strategic missiles (for personnel requirements only). Included is a general description of the model with particular emphasis on the personnel subroutine. This can handle eight specific types of weapons of SAC, ADC, TAC, and MATS, and can extrapolate, from these eight systems, 72 varying system mixes and basing situations. This discussion describes the actual operation of the model rather than the underlying reasons for the methodology. The Memorandum in no way intends to imply that these operations are the only way to determine resource requirements for an individual weapon system, but only to describe one way in which the resource requirements of individual weapon systems can be determined with reasonable and realistic results. 177 pp.