A Multi-Objective Vibration Damping Optimization Algorithm for Facility Location and Suppliers quota Allocation in a Multi-product Multi-period Supply Chain Problem(Case Study of Khorraman Pharmaceutical Company)

For powerful manufacturing firms, one of the important factors for survival in today's competitive environment is decreasing production costs. Materials and equipment supplied play an important role in supply chain management and production facilities location, have a significant impact on supply chain design from the perspective of transportation and distribution planning in logistics decisions of the company. The purpose of this study is to provide an integrated model for supplier selection, quota allocation and production facility location problems in a multi - period and multi - product supply chain by considering economic goals, network reliability and evaluation of selected suppliers. In this regard, a mixed integer programming model has been developed and solved for small size problems by an exact method. Since the proposed problem is NP-hard, a Multi-Objective Vibration Damping Optimization (MOVDO) algorithm is proposed by introducing criteria for examining the results to solve large-scale problems. Numerical results show that the MOVDO algorithm reduces the problem solving time and provides near-optimal solutions with a small percentage difference compared to the exact method, which is also good in the quality of the response criterion.