第一章引言...............................................................................................31.1编写目的......................................................................................31.2背景..............................................................................................41.3术语..............................................................................................41.4参考文献......................................................................................4第二章任务概述.......................................................................................52.1目标..............................................................................................52.1.1开发意图...........................................................................52.1.2应用目标...........................................................................52.1.3作用及范围.......................................................................52.1.4背景...........................................................................................52.2系统的特点.................................................................................62.3用户的特点.................................................................................62.4假定和约束.................................................................................7第三章用途...............................................................................................73.1功能..............................................................................................73.2性能..............................................................................................73.2.1精度...................................................................................73.2.2时间特性...........................................................................83.2.3灵活性...............................................................................83.3安全保密......................................................................................83.4系统流程图..................................................................................8第四章需求规定.......................................................................................94.1对功能的规定..............................................................................94.2对性能的规定..............................................................................94.2.1精度.......................................................................................94.2.2时间特性要求.......................................................................94.2.3灵活性...................................................................................94.3输入输出要求............................................................................104.4故障处理要求............................................................................10第五章运行环境规定.............................................................................105.1设备............................................................................................105.2支持软件....................................................................................105.3接口.............................................................................................115.3.1.用户界面...........................
