Overview/PARCOM (Parts Requirements and Cost Model) Turnkey Project (OPTP)

The project consisted principally of a turnkey transfer, from CAA to the Aviation Systems Command, of the Overview and PARCOM Models, developed on a previous study Aircraft Spares to provide a quick reaction methodology for forecasting aircraft fleet wartime sustainability and spare parts requirements. The project also included testing of the Dyna-METRIC Model, to meet a perceived shortcoming of Overview and PARCOM--their inability to represent a partial substitution parts replacement policy. PARCOM was extended to include partial substitution and to replace Overview. Dyna-METRIC can assess fleet sustainability with part substitution, but is expected to be most useful for higher resolution multi-echelon and indenture analyses. Keywords include Aircraft Spares Spare parts Logistics War reserves Stockage requirements Inventory management Overview PARCOM Dyna-METRIC Partial substitution.