This report gives a managerial overview of the Life Cycle Cost Impact Modeling System (LCCIM), which was designed to provide the Air Force with an in-house capability of assessing the life cycle cost impact of weapon system design alternatives. LCCIM consists of computer programs and the analyses which the user must perform to generate input data. The system is different from existing models of similar purpose because it incorporates a capability to analytically derive, as well as aggregate, data required for the estimation of life cycle cost. This feature provides an improved capability to conduct trade-offs among candidate design, manpower, and logistic alternatives early in the systems acquisition process. LCCIM represents a systematic approach to resource requirements analysis and cost estimation, which functions in terms of the operation and system support processes associated with the system being examined. Also included in this report is a general description of the initial LCCIM application; i.e., an assessment of the potential impact of the Digital Avionics Information System concept of avionics integration. References are included. (Author/LLS)