A multi-objective, multi-product and multi-transportation mode sustainable closed-loop supply chain network design
This research developed a mixed-integer mathematical model for a generic closed-loop supply chain network design (SCND), optimizing all three inherent dimensions of sustainability, namely, cost, environmental, and social impact, simultaneously. The proposed novel hybrid model is designed for a single period and takes into account some real-life characteristics of SC implementation such as multi-echelons, multi-products and multi-transportation modes. The weighted sum approach is used to solve that model on GAMS/CPLEX solver. In addition, the numerical testing is carried out in the case of an automotive SCND in UK Mercedes-Benz Car to test the validity of the proposed model. The result shows that the obtained solution is Pareto-optimal as it provides a ‘fair’ compromise for conflicting trade-offs between cost, environmental, and social objectives.