目录1 引言..........................................................................11.1 编写目的................................................................11.2 背景说明................................................................11.3 术语定义...............................................................11.4 参考资料...............................................................12 任务概述......................................................................22.1 目标....................................................................22.2 用户的特点..............................................................22.3 假定与约束..............................................................23 需求规定......................................................................33.1 对功能的规定............................................................33.1.1 系统功能图........................................................33.1.2 功能模块简介......................................................33.1.3 系统用例图........................................................53.1.4 系统数据流图.....................................................63.2 对性能的规定............................................................63.2.1 精度..............................................................63.2.2 时间特性要求......................................................63.2.3 灵活性............................................................73.3 输入输出要求...........................................................73.4 数据管理能力要求.......................................................73.5 故障处理要求...........................................................73.6 其它专门要求...........................................................74 运行环境设定.................................................................84.1 设备....................................................................84.2 支持软件.....................................................
