说明：  该文档是为学生成绩管理系统设计的概要设计文档，主要完成系统的数据设计、架构设计、接口设计以及模块设计，从原来的需求分析转化为大体的设计实现，构成各个实现的模型，使各部分的功能清晰可见。
(This document is designed to provide students a summary of performance management system design documents, mainly to complete the system data design, architecture design, interface design and module design, from the original needs analysis into the design and implementation generally constitute the various implementation models, so that all clearly visible part of the function.)