目录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.............................................................................................................................32.3假定和约束.............................................................................................................................33需求规定.......................................................................................................................................43.1对功能的规定.........................................................................................................................43.2对性能的规定.........................................................................................................................43.2.1精度.................................................................................................................................43.2.2时间特性要求..................................................................................................................43.2.3灵活性要求.....................................................................................................................53.3输人输出要求.........................................................................................................................53.4数据管理能力要求.................................................................................................................53.5故障处理要求.........................................................................................................................53.6数据流图................................................................................................................................63.7ER图.......................................................................................................................................93.8数据字典...............................................................................................................................113.9状态转换图...........................................................................................................................204运行环境规定..............................................................................................................................214.1设备..........................................................................................................
