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1可行性研究 ..................................................1
2 需求分析 ...................................................3
2.1功能需求 ................................................3
2.2数据流图 ................................................4
2.3功能模块图 ..............................................4
2.4系统数据流程图 ..........................................5
2.5数据词典 ................................................7
3
概念结构设计..................................................
..............................................................
........8
3.1
接口设计......................................................
..............................................................
.....8
3.2 局部E-
R图.........................................................
............................................................
.9
3.3 整体E-
