目录1引言.........................................................................................................................11.1编写目的..............................................................................................................11.2项目背景及意义..................................................................................................11.3定义......................................................................................................................11.4预期读者和阅读建议..........................................................................................11.5参考资料..............................................................................................................22任务概述.................................................................................................................22.1目标......................................................................................................................22.2运行环境..............................................................................................................22.3条件限制..............................................................................................................23功能需求.................................................................................................................23.1用户界面..............................................................................................................23.2功能需求..............................................................................................................33.1.1功能分类...................................................................................................33.1.2功能描述...................................................................................................34数据描述.................................................................................................................54.1数据库描述..........................................................................................................54.2数据字典..............................................................................................................54.3数据流图..............................................................................................................65其它非功能需求.....................................................................................................75.1性能需求..............................................................................................................75.1.1数据精确度....................................................................................................75.1.2时间特性........................................................................................................85.1.3适应性............................................................................................................86其它需求.................................................................................................................86.1可使用性..............................................................................................................86.2安全保密性..........................................................................................................86.3可维护性..............................................................
