چكيده به لاتين
The existence of numerous social, economic, and environmental problems and the need to improve long-term performance in organizations has led the supply chain towards sustainability. On the other hand, in line with the emergence of new business models, increasing the level of competition, changing demands and expectations of customers, using of multiple channels and deciding on the distribution system of the product; considering sustainability consideration is growing every day and is especially important. The researches carried out in this study indicate that the appropriate distribution according to the type of product and the number of vehicles needed for the transportation of the product is a significant and important issue in Digikala corporation. In this regard, a new model for the sustainable design of single-periodic, multi-product, multi-echelon, multiple vehicles and considering multiple channels is presented. Hence, a mixed integer programming model has been formulated for economic, environmental and social objectives which These goals include minimizing transportation costs, purchasing a vehicle and building a warehouse, minimizing the amount of carbon dioxide released by transport vehicles and building wares and maximizing the number of job opportunities. The model mo-MILP problem is solved using the goal programming technique and GAMS software. In order to evaluate the applicability of the proposed mathematical model, Digikala corporation was used as a case study. The results of solving the model are concluded as: optimal distribution of Digikala products (including steamer, suitcase, copper dish and washing machine), the number of vehicles required and the number of job opportunities created by the product transfer.
