The C-17 Aircrew Training System (A TS) Life Cycle Cost (LCC) model is being constructed around the approved Wright Patterson AFB, Aeronautical System Division Work Break down Structure (WBS) for Aircrew Training Systems as modified for the C-17 ATS program. Structuring the LCC model around this established WBS provided the framework so that the model is generic enough to fundamentally analyze any integrated training system. In addition the use of this approved WBS allows the model predictions to be easily integrated and compatible with a prime contractor's accounting system used to perform cost accumulations, cost reporting, budgeting, and cost tracking.

Rather than make the C-17 ATS LCC model a pure accounting type of LCC model, a decision was made to integrate the functional parameter algorithms of each WBS element with the cost element relationship algorithms of each WBS element. This caused the model to be more of an engineering type of model in which the predicted outputs of the model are sensitive to input data, and changes in the input data to the model (i.e. program and pragmatic data changes). As a result, the model can be used to make early predictions for program development and acquisition decisions and can then be re-used during the operations and support phase to make continuing economic decisions based on actual annual operational decisions.

Because of the automated capability of the model, the vast array of integrated cost analysis tools embedded within the model, and the complete on-line documentation features of the model, the information necessary to understand what elements within the system are cost drivers, why these cost drivers exist, and which LCC inputs have the greatest influence on these cost drivers is readily available to the analyst. The complete on-line documentation provides different analyst using the model the ability to easily adapt the model to their specific needs, and provides program management with a quick and flexible method of preparing required program cost and budget reports.