Fuzzy Optimization of A Multi Stage Multi Item Closed-Loop Flexible Supply Chain Network Under Fuzzy Material Requirement Constraints (original) (raw)

This work applies fuzzy sets to integrating the distribution problem of a multi product, multi tiered closed loop flexible supply chain network (involves suppliers, factories, warehouses, distribution centers, retailers, end customers and collection, recovery, recycling centers) under fuzzy material requirement constraints. The proposed fuzzy multi-objective mixed integer linear programming model attempts to simultaneously minimize total transportation costs between all echelons and total fixed costs of manufacturers and distribution centers. The model has been formulated as a mixed-integer linear programming model where data are modeled by triangular fuzzy numbers. Finally, a numerical example is solved by a professional package program, compiled the results and discussed.