中文摘要：

可选模块需要在必选模块的基础上进行配置，同时最优的必选模块配置也是依赖于可选模块配置的。为解决产品设计中属于不同层次结构的两类模块设计问题，在主从模型中引入0-1变量，实现了对模块属性档级的选择，以制造商成本和客户效用的比值及产品族通用性指数作为上层目标，以产品可选属性效用最大化作为下层目标，实现了两类模块的优化组合。最后用自行车产品族案例验证了该方法的可行性和有效性。

英文摘要：

Optional modules were always enacted within mandatory modules, and meanwhile an optimal mandatory modules configuration depended on how optional modules were to be chosen. For solving how to design two types of modules in different level, a bilevel mixed O--1 nonlinear program- ming model was developed, comprising an upper-level optimization problem and a lower-level optimi- zation problem. The upper level seeks for maximizing the shared surplus and commonality index of an entire product family. The lower level seeks for maximizing the utility of optional attributes. At last, through the case of bicycle proddut family, the feasibility and effectiveness of the model were valida- ted.