中文摘要：

以单计划周期内总生产成本最小为目标，考虑回收件质量差异对生产成本的影响，建立了面向再制造生产计划的非线性整数规划模型．采用3种不同的再制造和废弃策略，比较总生产成本的变化规律．研究结果表明：当回收量小于需求量时，无需考虑分级，但需使用新零部件以满足再制造需求；当回收量大于需求量时，优先采用高质量回收件和优先废弃低质量的回收件，有利于降低制造成本，获得最佳的经济效益．

英文摘要：

Aiming to minimize the total production costs in a single planning period, a nonlinear integer programming model for remanufacturing production plans is established considering the influence of different qualities of returns acting on production cost. Three different remanufacturing and discarding strategies are adopted to analyze the change rules of the total production costs. The results returns is greater than indicate that when the number of remanufacturing returns of high the demand, preferentially quality and discarding those of low quality can bring better economic benefits due to manufacturing cost reduction. However, when the number of returns is smaller than the demand, there is no need to consider grading of returns, whereas new demand of remanufacturing. parts are required to satisfy the