技术博客03 软件需求工程和UML建模第二组

UML建模 结构化需求分析

第二组  校车座位预约系统

01 结构化需求分析概述

功能分解图:

需求优先级划分:

 

需求细化:


02 过程建模

数据流图DFD片段:

 

数据流图DFD-0层:

 

数据流图DFD-1层:

微规格说明(伪码):

Read the order has received
     SELECT CASE
          CASE 1(The order is “Choose”)
              BEGIN IF
                   IF(The Number of remaining seats>0)
                        THEN re-set the seats-1
                        RETURN “Success” TO Choose               ELSE
                        RETURN “No enough seats” TO Choose
              END IF
          CASE 2(The order is “Cancel”)
              BEGIN IF
                   re-set seats+1
                   IF(Achieving breach of contract)
                          PUT Default mark TO ID
              END IF


数据字典:


 

 

03 数据建模

 ERD建模:(建立实体关系)

ERD建模:(添加详细描述信息)

猜你喜欢

转载自www.cnblogs.com/yuehungege/p/10922632.html
今日推荐