Designing an agile supply chain network for perishable products with resilient suppliers

This article attempts to design the integrated supply chain of perishable products with considering agility and resilience. For this purpose, in the first stage, the evaluation and selection of suppliers are done with the network data envelopment analysis model based on resilience indicators, and the two groups of main and backup suppliers are selected through the evaluation. In the next step, the four-tier supply chain including suppliers, production centers, distribution centers, and customers is considered. In order to increase the agility of the integrated supply chain, there is a relationship between the distribution centers. In order to be close to the real environment, the demand for new products is considered as uncertainty, which is represented by a fuzzy number. To avoid wasting resources, a sales discount strategy has been considered for products that are approaching their expiration time. Due to the complexity of the model and the high solution time by MIP, a decomposition algorithm for column generation is considered, which significantly improves the solution time. The proposed model is used in the dairy industry.