1 引言...............................................................................................................................................21.1 编写目的 ................................................................................................................................21 。 2 背景 .....................................................................................................................................21.3 定义 ........................................................................................................................................21 。 4 参考资料 ..............................................................................................................................22 任务概述 .......................................................................................................................................32.1 目标 ........................................................................................................................................32.2 用户的特点 .............................................................................................................................42.3 假定和约束 .............................................................................................................................43 需求规定 .......................................................................................................................................43.1 对功能的规定 .........................................................................................................................43.2 对性能的规定 .........................................................................................................................53.2 。 1 精度 ...............................................................................................................................53 。 2 。 2 时间特性要求 .....................................................................
