[图解]SysML和EA建模住宅安全系统-08-安全企业用例图

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接下来，我们就来画一下

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安全企业组织的用例图，画在哪里

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它是在3-用例这个包下面

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这是包的名字

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这是图的名字

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我们来画一下

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这里，3-用例

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这个包下面，右键点它

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添加一个图

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然后选用例

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然后图的名字叫什么

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安全企业用例

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安全企业用例

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OK，好

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uc package3-用例

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安全企业用例

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对上了

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然后，首先我们加一个边界框

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把这个框加进去

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这个框在哪里

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就这个了

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这里，大一点，过来一点

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然后这个框这里就是它的组织的名称了

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安全企业

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然后接下来是执行者

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居民、调查员

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物理环境、入侵者，4个

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这里，居民

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调查员

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物理环境

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入侵者

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好，执行者有了

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小一点

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接下来就用例了

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提供应急响应

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然后下面

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我们把它加进去

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医疗

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然后是入侵者、火灾

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提供（写错字）

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火灾

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然后这三个就泛化到上面这个

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这里它泛化是搞成一棵树一样的

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这三个是并在一起的

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我们把它调一下

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怎么调

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右键点这个，这里选树的风格

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这个也调

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好

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然后这边有一个减轻故障的用例

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然后它扩展到这个用例，画过来

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然后扩展，这里，扩展这里它有个名字

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这个不用加就可以的

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乱加在这里

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没有必要

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既然它这里有了

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我们就加进去，加在哪里

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因为扩展本身它实际上是相当于一种关联

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我们就加在它的属性这里

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给它命个名就行了

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这个名字叫什么

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故障事件

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我们选中这个

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然后这里，故障事件

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下来一点，这样

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下面还有一个提供调查数据

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调查员，往这边挪一点

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这样，接下来就要建立

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它们之间的关联

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画过来

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我们要注意到这个图上面

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它关联是没有方向的

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UML规范里面

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包括SysML里面

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是没有指定说一定要用箭头

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我们前面示例的

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我在幻灯片上示例那个是有箭头的

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就是说我认为是一种更好的做法

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就是说，从主执行者指向用例的

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我们就认为是主动的

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而用例指向辅执行者是被动的

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那么如果说不用箭头的话

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一般是把辅助执行者放在右边

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然后主执行者放左边

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但是这本身还是有问题的，为什么

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因为主辅只是针对某个用例而言

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针对这个事情上我是主动的

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很可能另外一个事情我是被动的

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所以你不可能说一个Actor

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它就是辅执行者，不一定

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可能这个用例

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它是主，下一个用例它就是辅了

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所以还是得要箭头

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但这里既然没有画，我们就算了

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就不画了

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画过来，选关联

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还有吗

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哪个

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入侵者，火灾

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上来

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应该是火灾、物理环境

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入侵者

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好，齐了

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然后我们来对齐一下

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过来，这三个我们对齐一下

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下来一点，好

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我们看，对照一下

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差不多，就这样

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这个就是我们的图17.13

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安全企业用例