具有可变并发流数的UML活动图 [英] UML Activity Diagram with variable number of concurrent flows

问题描述

在UML中，发生并发流数量可变的情况时，我感到很挣扎。一个简单实用的现实生活场景是POOL乘车共享服务。对于第一个车手来说，整个流程似乎很容易。但是，一旦第一个骑手进入汽车，而驾驶员接上第二个骑手，则变得很难在图表上显示，因为现在骑手1和骑手2是并发流，并且这些并发流的数量始终是可变的，介于0和数字之间

对这种行为进行建模的最佳UML图类型和技术是什么？我该如何解释和描述流向观众的并发流量的可变数量？以便将有关线程/类/对象的特定详细信息排除在外。

这是我的尝试：

解决方案

这里是另一种方法，该方法在活动图上显示灰色的并发流程，但同时添加了额外的活动/状态图以显示驾驶员的观点。最重要的是，我添加了信号，因为它们应该描述异步活动。

但是，我担心并发流仍然会造成混乱。在最简单的情况下，将是： 1个服务器， 1个驱动程序（驱动程序应用程序）和多个骑手（骑行应用程序）。活动图上显示的内容表明存在多个驱动程序（驱动程序应用程序）！

I'm struggling with modeling in UML a scenario where variable number of concurrent flows occurs. A good and simple real life scenario would be a POOL ride-sharing service. For first rider whole flow seems easy. However once first rider is in a car and driver picks up second rider, then it becomes difficult to show on diagram, as now rider 1 and rider 2 are concurrent flows, and number of these concurrent flows will always be variable, between 0 and number of maximum seats in a car.

What's the best UML diagram type and technique to model such a behavior? How do I explain and depict variable number of concurrent flows to the audience?

Audience is rather non-technical, being upper management / finance, so I would like to keep specific details about threads/classes/objects out of the picture.

Here is my attempt:

解决方案

Here is another approach that shows grayed out concurrent flow on activity diagram, but also adds extra activity/state diagram to show driver's perspective. On top of that I added signals as they are supposed to depict asynchronous activities.

However I'm afraid that concurrent flow might still be confusing. In simplest scenario there would be: 1 Server, 1 Driver (driver app) and multiple Riders (rider apps). What's visible on the activity diagram suggests that there are multiple Drivers (driver apps) instead!

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