Trade-off models are developed for siting inventories of repair parts by Naval Supply Center (NSC) which must support a local Naval Air Rework Facility (NARF). Two strategies are considered; siting at the NSC with direct delivery alternatives which include both scheduled and unscheduled delivery schemes are modeled when siting is at the NSC. The measure of effectiveness for all alternatives is the expected total costs per time period. Cost elements include delivery costs and production delay costs. Algorithms for solving the trade-off models are also presented. (Author)