1 引言 ............................................................................................................................................... 1 1.1 编写目的 ................................................................................................................................. 1 1.2 背景......................................................................................................................................... 1 1.3 定义......................................................................................................................................... 1 1.4 参考资料 ................................................................................................................................. 2 2 任务概述 ....................................................................................................................................... 2 2.1 目标......................................................................................................................................... 2 2.2 用户的特点 ............................................................................................................................. 2 2.3 假定和约束 ............................................................................................................................. 3 3 需求规定 ....................................................................................................................................... 3 3.1 对功能的规定 ......................................................................................................................... 3 3.2 对性能的规定 ......................................................................................................................... 3 3 .2 .1 精度 .................................................................................................................................. 3 3 .2 .2 时间特性要求 .........................
