Use Case

Use case is a diagrammatic representation of the actions that the system will perform. It will also include the deviation that the system will have. The use case diagram will include the actors who are involved in the interaction. The diagram will explain the different ways of interaction that the actor will do with the system.

There are two types of use case. One is business use case and the other is system use case. 

The business use case will describe the actor’s interaction with respect to the business process. The business use case diagram will be prepared by the business analyst. 

The system use case will explain the actor’s interaction with IT system. The system use case diagram will be prepared by the system analyst.