فارسی
Thursday 02 February 2023

Cardinal Theme

A Two-Echelon Green Supply Chain with Simultaneous Pickup and Delivery

Supply chain network determines the structure of a chain and affects its costs and performance. It deals with a variety of decisions such as determining number, size and location of facilities in a supply chain (SC) as well as fulfilling customers demand. In this paper, we considered a variant of the Location-Routing Problem (LRP) with consideration of green aspects, namely the green LRP with simultaneous pickup and delivery (GLRPSPD). This specific problem seeks to minimize total cost by simultaneously locating the distribution centers and designing the vehicle routes that satisfy pickup and delivery demand of each customer at the same time, in a way that ecological aspects are observed. The problem was formulated as a mixed integer programming (MIP) model, which could then be solved using general algebraic modelling system (GAMS) optimization software to determine the best vehicle routs and the optimal number of utilized vehicles.


Setareh Abedinzadeh ( University of Science and Culture )
Ali Ghoroghi ( University of Science and Culture )
Sara Afshar ( Islamic Azad University )