【用途】:帮助开发团队以一种可视化的方式理解系统的功能需求。 用例图中包含6个元素,分别是执行者(Actor),用例(Use Case),关联关系(Association),包含关系(Include),扩展关系(Extend)以及泛化关系(Generalization)。 角色(Actor):即使用本系统的有哪些角色,不同的角色使用的系统功能部分是不同的,在用例图中用小人...
用例模型是从应用领域(Application domain)的角度,面向用户的一种模型,旨在描述用户眼中(而非程序员眼中)此系统的功能行为。以下是一张用例图,先有一个大致的印象: 一个售票系统的用例图 用例图体现了该系统能够为参与者提供的种种功能以及这些功能之间的联系。要画好一张用例图,需要把握三个元素:参与者(Actor)、...
用例(Use Case):用例是系统功能的简单、具体的描述,它定义了一组动作序列,这些动作序列由系统与一个或多个外部用户(演员)共同完成,以实现特定的目标。 演员(Actor):在用例图中,演员代表了与系统交互的外部用户或其他系统。演员可以是人,也可以是外部系统。 用例图(Use Case Diagram):用例图展示了系统的功能和与...
Another IoT use case involves the use of open-source frameworks, such as Apple ResearchKit, to create visual consent flows, real-time dynamic active tasks, and surveys by using customizable modules.Partners and customers can build a patient-facing interface created and customized for Tara based on...
For each ChildShape, ParentShape == this. (Inherited from IShape.) Color Gets or sets the color of the shape. (Inherited from IShape.) Diagram The diagram that contains this shape. (Inherited from IShape.) FileName The path of the modeling project file on which the diagram is stored....
The figure below shows a use case diagram example for a vehicle system. As you can see even a system as big as a vehicle sales system contains not more than 10 use cases! That's the beauty of use case modeling. The use case model also shows the use of extend and include. Besides,...
初次学习UML—用例图(Use Case Diagram) 用例图(Use Case Diagram) 概念 由参与者(Actor)、用例(Use Case)以及它们之间的关系构成的用于描述系统功能的动态视图称为用例图。 用例图的构成要素 用例图包含3方面内容:参与者(actor)、用例(use case)、关系。
Actors can generalize other actors as detailed in the following diagram: Use Cases A use case is a single unit of meaningful work. It provides a high-level view of behavior observable to someone or something outside the system. The notation for a use case is an ellipse. ...
Benefits of Use Case Diagram Use cases is a powerful technique for the elicitation and documentation of black-box functional requirements. Because, use cases are easy to understand and provide an excellent way for communicating with customers and users as they are written in natural language. ...
Use case diagrams model the functionality of a system using actors and use cases. Use cases are a set of actions, services, and functions that the system needs to perform. Learn more.