某电视台拟开发一套信息管理系统,以方便对全台的员工、栏目、广告和演播厅等进行管理。
【需求分析】
(1)系统需要维护全台员工的详细信息、栏目信息、广告信息和演播厅信息等。员工的信息主要包括工号、姓名、性别、出生日期、电话和住址等,栏目信息主要包括栏目名称、播出时间和时长等,广告信息主要包括广告编号、价格等,演播厅信息包括房间号、房间面积等。
(2)电视台根据调度单来协调各档栏目、演播厅和场务。一销售档栏目只会占用一个演播厅,但会使用多名场务来进行演出协调。演播厅和场务可以被多个栏目循环使用。
(3)电视台根据栏目来插播广告。每档栏目可以插播多条广告,每条广告也可以在多档栏目插播。
(4)一档栏目可以有多个主持人,但一名主持人只能主持一档栏目。
(5)一名编辑人员可以编辑多条广告, 一条广告只能由一名编辑人员编辑。
【概念模型设计】根据需求阶段收集的信息设计的实体联系图(不完整)如图所示,请补充完整。
正确答案及解析
正确答案
解析
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