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We consider the network design problem for hazardous material transportation that is modeled as a bilevel multi-commodity network flow model. We study a combinatorial bilevel formulation of the problem and present results on its solution space.We propose a family of valid cuts and incorporate them within an exact cutting plane algorithm. Numerical testing(More)
We study an integrated inventory-location problem with service requirements faced by an aerospace company in designing its service parts logistics network. Customer demand is Poisson distributed and the service levels are time-based leading to highly non-linear, stochastic service constraints and a nonlinear, mixed-integer optimization problem. Unlike(More)
We present two integrated network design and inventory control problems in service-parts logistics systems. Such models are complicated due to demand uncertainty and highly nonlinear time-based service level constraints. Exploiting unique properties of the nonlinear constraints, we provide an equivalent linear formulation under part-warehouse service(More)