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针对市场需求的不确定性和供应商产出产品合格率的不确定性,提出供应商产出量小于销售商订购量时需再生产满足销售商的订购,以及供应商生产过量和回购的产品通过折扣市场出售,建立以供应链期望利润为目标函数,以回购单价为决策变量的供应链回购契约决策模型.通过模型的分析,证明了模型存在最优的期望利润,给出了最优回购单价满足的方程;同时,也证明了最优订购量,最优生产量和销售商最优期望利润是回购单价的增函数.最后,通过算例验证了模型的有效性.
In view of the uncertainty of market demand and the uncertainty of qualified rate of suppliers’ output products, it is proposed that when the output of suppliers is smaller than that of vendors, the products must be reprocessed to meet the ordering of vendors and the products of overproducing and repurchasing of suppliers Through the discount market, a supply chain repurchase contract decision-making model with the expected profit of the supply chain as the objective function and the repurchase of the unit price as the decision variable is established.By the model analysis, it is proved that the model has the optimal expected profit, The optimal order quantity, the optimal production quantity and the optimal profit expectation of the seller are proved to be an increasing function of the repo unit price.Finally, the validity of the model is verified by an example.