UML建模——用例图(Use Case Diagram) 原文链接:https://www.cnblogs.com/lcword/p/10472040.html 用例图主要用来描述角色以及角色与用例之间的连接关系。说明的是谁要使用系统,以及他们使用该系统可以做些什么。一个用例图包含了多个模型元素,如系统、参与者和用例,并且显示这些元素之间的各种关系,如泛化、关联和依...
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)、...
UML基础:用例图Use Case Diagram(1) 1. 用例图概述 用例图(Use Case Diagram):描述“用户、需求、系统功能单元”之间的关系,是参与者所能观察和使用到的系统功能模型图。 用例用于软件开发过程中的需求分析阶段。 确立系统边界分内外: (1)外,找参与者,不需要开发,但需考虑建立接口,让系统内外可以通过接口传递信...
A use case describes how a user uses a system to accomplish a particular goal. A use case diagram consists of the system, the related use cases and actors and relates these to each other to visualize: what is being described? (system), who is using the system? (actors) and what do ...
Lecture SeriesRequirements Modeling (Use Case Diagram + Use Case Description) Session ObjectivesAt the end of this lecture You will be able to :Draw a use case diagram to depict functional requirements of a system.Expose typical mistakes by students.Write use case description for a use case. us...
16、 views products online.Discussion ExerciseDraw a use case diagram for the scenario below:Exercise - SolutionSession ObjectivesAt the end of this lecture You will be able to :Draw a use case diagram to depict functionalrequirements of a system.Expose typical mistakes by students.Write use case...
Draw a use case diagram for the scenario below: Exercise - Solution Session Objectives At the end of this lecture You will be able to : Draw a use case diagram to depict functional requirements of a system. Expose typical mistakes by students. ...
Use case diagram uses The reasons why an organization would want to use case diagrams include: Represent the goals of systems and users. Specify the context a system should be viewed in. Specify system requirements. Provide a model for the flow of events when it comes to user interactions. ...
AUMLuse case diagram is the primary form of system/software requirements for a new software program underdeveloped. Use cases specify the expected behavior (what), and not the exact method of making it happen (how). Use cases once specified can be denoted both textual and visual representation...
在New Diagram窗口中,选择Use Case Diagram。 单击“Next”。 输入图表名(name) 称和描述 (description)。Location字段 (field) 使您可以选择一个模型来存储图表。 单击“OK”。 绘制系统元素 (drawing a system) 若要在用例图中创建系统,请在“图表”工具栏上选择“System”,然后在“图表”窗格 (diagram pane...