UML use case diagram

The use case diagram is used to describe the relationship between users, requirements, and system functional units. It shows a system functional model diagram that can be observed by external users.

[PURPOSE]: help the development team understand the functional requirements of the system in a visual manner.

The use case diagram contains the following elements:

1.Participant)

The user, organization, or external system that interacts with your application or system. Represented by a villain.

 

 2.Use Case)

Use Cases are externally visible system functions that describe the services provided by the system. Represented by an elliptic

 

 

 

Example of a use case chart:

 

Use case description table:

 

UML use case diagram