In this paper, we present a complex distribution network design problem in supply chain system which includes location and inventory decisions. Customers’ demand is generated randomly and each distribution center maintains a certain amount of safety stock in order to achieve a certain service level for the customers it services. Unlike most of past research, our model allows for multiple levels...

Department of Industrial Engineering, Islamic Azad University – Parand Branch, Parand, Iran Grupo de Sistemas de Optimización Aplicada, Instituto Tecnológico de Informática (ITI), Ciudad Politécnica de la Innovación, Edificio 8G, Acceso B, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain Department of Industrial Engineering, Iran University of Science and Technolog...

This paper shows a general model of a Mixed Production Planning problem with fuzzy demands. The main focus is the development of a model for Production Planning using fuzzy sets in order to use classical mathematical programming techniques to reach an optimal solution over a multiple criteria context. The classical Fuzzy Linear Programming model namely the Soft Constraints Model is used to invo...

In this paper, we consider the inventory robust constraint control problem with an uncertain demand. The considered system deals with a non-linear discrete-time stochastic model of a special structure. The robust control designing, consisting in the inventory product level minimization by the corresponding adjustment of the production rate, is shown to be converted into certain attractive ellip...

This paper considers a single-item, periodic-review inventory model with uncertain demands. We assume a finite production capacity in each period. With stationary data, a convex one-period cost function and a continuous demand distribution, we show (under a few additional unrestrictive assumptions) that a modified basic-stock policy is optimal under the discounted cost criterion, both for finit...

Abstract. In this research we concentrate on developing and analyzing a programming model for a version of uncertain vehicle routing problems (VRPs). The customers demands are random fuzzy variables and the travel times between customers follow given probability distributions. Vehicles set out from a single depot, serve a number of customers and upon completion of their service, return to the d...

We report on a series of experiments that test the effects of an uncertain supply on the formation of bids and prices in sequential first-price auctions with private-independent values and unit-demands. Supply is assumed uncertain when buyers do not know the exact number of units to be sold (i.e., the length of the sequence). Although we observe a non-monotone behavior when supply is certain an...

Location-Routing Problem (LRP) emerges as one of the hybrid optimization problems in distribution networks in which, total cost of the system would be reduced significantly by simultaneous optimization of locating a set of facilities among candidate locations and routing vehicles. In this paper, a mixed integer linear programming model is presented for a two-echelon location-routing problem wit...