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 ...
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)、...
use case diagram 用例图（use case diagram）就是由主角、用例以及它们之间的关系构成的图。该图说明了用例模型中的关系。 可以将用例图组织到用例包中，并归用例包所有，让特定包中仅显示 类图(Class diagram)是显示了模型的静态结构，特别是模型中存在的类、类的内部结构以及它们与其他类的关系等...
Use Case Diagram USE-CASEDIAGRAMEXERCISE 1. Draw ausecasediagramfor an ATM machine with the following functionality. A customer’s interaction with thesysteminvolves logging in‚ making withdrawal requests‚ deposit requests‚ and balance inquiry requests. If the customer logs in‚ there is a...
Used to get an outside view of a system. Identify the external and internal factors influencing the system. Show the interaction among the requirements are actors. How to Draw a Use Case Diagram? Use case diagrams are considered for high level requirement analysis of a system. When the requir...
UML——Use Case Diagram(用例图) 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、关联和依赖。它展示了一个外部用户能够观察到的系统功能模型图。
2 在下面的用例图(UseCase Diagram)中,X1、X2和X3表示 (38) ,已知UC3是抽象用例,那么X1可通过 (39) 用例与系统进行交互。并且,用例 (40) 是UC4的可选部分,用例 (41) 是UC4的必须部分。(40)是() A.UC1 B.UC2 C.UC3 D.UC5 3 在下面的用例图(UseCase Diagram)中,X1、X2和X3表示 (38)...
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...
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. ...
A use case diagram is a dynamic or behavior diagram inUML. 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. In this context, a "system" is something being developed...