P&ID Examples How to Draw a Use Case Diagram in UML Lucidchart is a flexible tool for building use case scenarios in prose or in diagrams. There’s no need to install expensive, slow software when you can edit, perfect, and publish your use case scenarios and diagrams from your browser!
Software UML diagrams present different perspectives of the system, mainly the design, implementation, process, and deployment. It is referred to by software personnel, business users, and all interested in understanding the said system. A Use Case diagram is aUML diagramthat represents the dynamic ...
It is an illustration of the car rental system use-case UML. Here, the insurance company is the actor that is the organization interacting with bill payment use-case and the customer is also an actor. Through the customer, the insurance company is also interacting with other use-cases of th...
【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...
UML中继承关系的应用 在UML中,继承关系由一个空心箭头表示,由继承的一方指向被继承的一方(具体的一方指向抽象的一方)。 在用例图中,用例关系的箭头方向是比较容易出错的一点,我的记忆方法是带入“A extends B”,“A includes B” 和“A inherits B”这样的句型,箭头永远从主语指向宾语。
While UML use-case diagrams depict the different actors and goals, you can also use process flow diagrams to display the steps that will take place in each process: In the simplest form, it can be a linear flow from start to finish. In more complex use cases, you may have multiple bran...
用例图(UseCase Diagram)—UML图(一) 从上面的用例图模型,我们可以大致了解用例图所描述的是什么。下面进行详细介绍。 用例图,即用来描述什么角色通过某某系统能做什么事情的图,用例图关注的是系统的外在表现,系统与人的交互,系统与其它系统的交互。 用例图有三种构成元素,分别是:角色,用例,关系...
In UML, Use case diagrams are used as a standard notation for modeling real-world objects and systems. A use case is an artifact used in system analysis to identify, define, and organize system requirements. Here, the term "system" is something being developed or operated. Examples of system...
UML Use Case Diagram Example
用例(use case):系统功能 图形:如下图是登录功能 用例.png 每个用例都有一个名称:短小精悍的“动名词”如例如ATM系统,经典的用例有“取钱” “存钱”“修改密码”等。 参与者(actor):用户或者外部系统 图形: 参与者.png 对每一类参与者要有简短描述:如 学生:需要参加培养计划规定的课程,并通过考核 ...