A multi-objective sustainable closed-loop supply chain network problem with hybrid facilities

A sustainable closed-loop supply chain network requires conjunctive implementation of reverse logistics in the supply chain, with decisions that consider economic, environmental, and social factors. In real life, the problem needs to be addressed by prioritizing targets or interacting between them to give a range of solutions to the decision maker. In this context, this work proposes a novel multi-objective sustainable closed-loop supply chain network problem based on the revised network design model with hybrid recovery centers minimizing (1) the total economic cost, (2) the CO2 emission of vehicles used, and (3) the total obnoxious distance. The latter objective is a novel implementation of the social dimension of a sustainable model. A sensitivity analysis of the multi-objective model is developed through ANOVA. A dataset of instances was generated to test the model and the solution methods, which are configured with AUGMECON2, a linear programming relaxation implemented to improve the CPU time, and AUGMECON2-EXTENDED to obtain more solutions to avoid exploring all space of the solution. The results show that an AUGMECON2-EXTENDED implementation outperforms all the selected performance metrics. These performance metrics include NPS, CPU time, RPOS, QM, and HV. The results show an improvement on average of at least 50%$50\%$, 60%$60\%$, 90%$90\%$, 60%$60\%$, and 5.7%$5.7\%$, respectively, in those metrics, in comparison to other implementations.