《校园网上超市宅急送（网上购物系统）》 需求文档 1 引言 .................................................. 3 1 .1 编写目的 ................................................................................................................................. 3 1 .2 背景......................................................................................................................................... 3 1 .3 定义......................................................................................................................................... 4 1 .4 参考资料 ................................................................................................................................. 4 2 任务概述 ......................................... 5 2 .1 目标......................................................................................................................................... 5 2 .2 用户的特点 ............................................................................................................................. 5 2 .3 假定和约束 ............................................................................................................................. 5 3 需求规定 ......................................... 6 3 .1 对功能的规定 ......................................................................................................................... 6 3 .2 对性能的规定 ....................................................................................................................... 1 0 3 .2 .1 精度 ................................................................................................................................ 1 0 3 .2 .2 时间特性要求 ................................................................................................................ 1 0 3 .2 .3 灵活性 .................................................................................................
