USECASE DIAGRAMS
Use Case Diagram Model Behavior WithIn a System And Helps Developers Understand What The User Require. This Stick Man Represents What's called an actor.
Use case diagram can be useful for getting an overall view of the system and clarifying who can do and more importantly what they can't do.
Use case diagram consists of use cases and actor and shows tha interaction between the use case and actors.
- The purpose is to show the interaction between the use case and actor.
- To represent the system requirements from user's perspective.
- An actor could be the end-user of the system or an external system.
USECASE DIAGRAM
A use case is a description of set of sequence of actions. Graphically it is rendered as an ellipse with solid line including only its name . Use case diagram is a behavioral diagram that shows a set of use cases and actors and their relationship. It is an association between the use cases and actors. An actor represents a real-world object. Primary Actor-Sender, Secondry Actor Receiver.
