中文摘要：

考虑了包含多阶段和多家零售商在内的混合按订单生产（Produce-to—Order）和提前生产（Produce—in—Advance）策略库存模型．将这一模型推广至多种产品情况下，当需求为正态分布时，将这一问题转化为一类多目标约束最优化问题，并给出两种算法来解决这一问题．

英文摘要：

We formulate a general mixed produce-to-order and produce-in-advance inventory model having multiple stocking echelons and multiple retailers. It is shown that the problem to find an optimal inventory policy with a normal demand distribution can be reduced to a general constrained optimization problem. It can be changed into a multi-objective optimization problem. Finally, two numerical examples are given.