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I have drawn up a UML Use Case for a basic central heating control.

It should allow the user to turn the heating on, off and change the temperature as well as allow them to set a timer to make a change which the hub will then carry out.

The picture below is what I imagine this should look like but I have little experience with UML Case diagrams and I was wondering if this is correct or wrong?

Specifically I was unsure if passing the setTimer to the hub and my use of extends is correct.

Any guidance would be greatly appreciated. Thanks!

UML Use Case for Central Heating Control

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我在您的架构中不明白的一点是集线器？它是系统的内部部分还是系统外部？

如果这是一个内部部分，它就不能是一个演员，否则它可能是一个演员。

一个简单但有争议的解决方案是将 Time 定义为参与者，请参阅http://www.agilemodeling.com/style/useCaseDiagram.htm。

一个更棘手的解决方案是在来自用户保持扩展的链接上的 UC“heaterOn”、“heaterOff”、“changeTemperature”附近设置基数 0..1。就像那样，对我来说，它模拟了用例可以在没有演员的情况下执行，这意味着他们可以被安排。

参见具有 0..1 基数的 Actor

希望这可以帮助。

于 2017-02-24T09:45:09.737 回答