blocks|key|2799626|text|用例图无效，用例图不显示交换，例如使用部署图：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2799627|​|2799628|📷|atomic|offset|length|2799629|2799630|如果数据中心不是全局系统的一部分(与System1和System2相反)，则数据中心是次要参与者：|2799631|2799632|2799633|2799634|如果数据中心是全局系统的一部分，它就不会出现在图表中，因为这是实现的一部分。用例显示了必须做什么，而不是如何做。|2799635|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/96ea29e62193608a99eeb70f77265687.png|imageAlt|1|https://developer.qcloudimg.com/http-save/yehe-900000/b31a35fa4373fde50ec718e6012e2a06.png^0|0|0|0|1|0|0|0|0|0|0|1|1|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|12|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|13|8|@]|9|@$G|14|H|15|1|16]]|A|$]]|$1|I|3|C|5|6|7|17|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|18|8|@]|9|@]|A|$]]|$1|L|3|C|5|6|7|19|8|@]|9|@]|A|$]]|$1|M|3|E|5|F|7|1A|8|@]|9|@$G|1B|H|1C|1|1D]]|A|$]]|$1|N|3|C|5|6|7|1E|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1F|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X|Y|-4]]|Z|$5|T|U|V|A|$W|10|Y|-4]]]]

Your use case diagram is invalid, a use case diagram doesn't show exchanges, for that use a deployment diagram for instance :

<a href="https://i.stack.imgur.com/pPySA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pPySA.png" alt="enter image description here"></a>

<hr>

The Data Center is a secondary actor if is not part of your global system (contrarily to System1 and System2) :

<a href="https://i.stack.imgur.com/xkQWg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xkQWg.png" alt="enter image description here"></a>

If Data Center is part of your global system it doesn't not appear in the diagram because this is part of the implementation. The use cases show what must be done rather than how it is done.

blocks|key|1609925|text|如果您是在显示用例之后，那么只有一个您命名为Withdraw。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1609926|用例显示了处理正在考虑的系统(SUC)的参与者的单个附加价值。从业务角度看，您不关心技术细节。你会把它应用到{+ATM+must+be+used+}等需求中，但实际上你只是在追求UC的目标。接下来将描述如何实现这一目标的情景。只有那时你才关心(节目)技术。还请注意，仅使用动词的用例不是一个好的选择。使用谓词-主题(-object)形式，所以在您的情况下，Withdraw+money。|1609927|​|1609928|📷|atomic|1609929|1609930|尽管如此(我建议您一如既往地阅读有关用例的That+/Spence)，它看起来更像是在对现有系统做技术文档。您可以通过显示设备来做到这一点。|1609931|1609932|1609933|1609934|请注意，这里有一个数据中心和任意数量的自动取款机。现在，可以通过使用序列图、使用接口之类的方法来详细说明组件之间实际发生的事情。细节太多了，不能在这里显示/解释。|1609935|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/1d2bc946fd27d713d2b64e90015f1789.png|imageAlt|1|https://developer.qcloudimg.com/http-save/yehe-900000/a2d0f22ffa1a4908c6da9286b8883c12.png^0|M|8|0|1I|K|4Y|E|0|0|0|1|0|0|0|0|0|0|1|1|0|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@$9|16|A|17|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|18|8|@$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1D|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|1E|8|@]|D|@$9|1F|A|1G|1|1H]]|E|$]]|$1|M|3|I|5|6|7|1I|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|1J|8|@]|D|@]|E|$]]|$1|P|3|I|5|6|7|1K|8|@]|D|@]|E|$]]|$1|Q|3|K|5|L|7|1L|8|@]|D|@$9|1M|A|1N|1|1O]]|E|$]]|$1|R|3|I|5|6|7|1P|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1Q|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|1R|8|@]|D|@]|E|$]]]|V|$W|$5|X|Y|Z|E|$10|11|12|-4]]|13|$5|X|Y|Z|E|$10|14|12|-4]]]]

If you are after showing use cases, then there is only one you named <code>Withdraw</code>.

Use Cases show a single added value for an actor which is dealing with the system under consideration (SUC). From a business perspective you don't care about technical details. You will put that into requirements like <code>{ ATM must be used }</code> etc. But you're actually only after the goal behind the UC in the first place. Next would be to describe scenarios how that goal could be achieved. Only then you care about (program) technic. Please also note that verb-only use cases are not a good choice. Use a predicate-subject(-object) form, so in your case <code>Withdraw money</code>.

<a href="https://i.stack.imgur.com/HLwiD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HLwiD.png" alt="enter image description here"></a>

That being said (I recommend reading Bitter/Spence about use cases as always) it rather looks like you are doing a technical documentation of an existing system. You can do that by showing devices 

<a href="https://i.stack.imgur.com/qwo8H.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qwo8H.png" alt="enter image description here"></a>

Note the multiplicity that says there's one data center and any number of ATMs. Now what actually happens between the components can be detailed by using sequence diagrams, using interfaces and things like that. Details are too many to be shown/explained here.

<img src="https://i.stack.imgur.com/pQg3Y.png" alt="example use case that I have draw">

I am new to business analyst. Currently I have a project that needs to communicate between systems. Based on my use case, I have 2 systems and 1 data centre. 

<code>Client A</code> can use <code>System1</code> and <code>System2</code>. If <code>client A</code> makes a withdraw through <code>System1</code>, <code>System 1</code> needs to send the details to the <code>Data Centre</code>. 

<code>Client A</code> also can make a withdraw through <code>System2</code> and <code>System2</code> needs to send the details to the <code>Data Centre</code>. The <code>Data Centre</code> is basically the place where <code>System1</code> and <code>System2</code> submit their details to. Of course, it has a rule that <code>System1</code> and <code>System2</code> can't send and receive the details directly without the <code>Data Centre</code>. Can I draw it out like this?

How to draw use case for two systems?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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​​我是新来的业务分析师。目前，我有一个项目，需要在系统之间进行通信。根据我的用例，我有两个系统和一个数据中心。Client A可以使用System1和System2。如果client A通过System1退出，System 1需要将详细信息发送给Data Centre。Client A还可以通过System2进行提取...

问如何绘制两个系统的用例？
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问如何绘制两个系统的用例？EN