Green supply chain design: A multi-product multi-period programming model

Imposition of strict environmental protection acts and the imperative need of best possible allocation of resources have given birth to the concept of “low carbon logistics.” Environmental laws force the manufacturers to extend their existing supply chains to form a closed loop supply chain through the setup of an efficient recovery system. In this paper a multi-product and multi-period closed-loop supply chain is proposed to minimizing operating and transportation costs, and reducing environmental effects of supply chain. The proposed closed loop supply chain network consists of four echelons include supplier, plant, distribution center and customer market zone in the forward chain and four echelons include collection center, dismantler center, recycling center and disposal center in the reverse chain. This model determine the optimal flow of parts and products in the supply chain network. Then the model is solved by the LINGO 16 software and results of that are analyzed.