Use case diagram is a type of uml diagram or behavior diagram which gives a descriptive way of representation created from use case. It is the simplest representation of user ant system interaction. By the analysis of use case a UML Use Case diagram is created. Its purpose is to present a graphical overview of the functionality provided by a system in terms of actors, their goals (represented as use cases), and any dependencies between those use cases
Actor: The role that an outsider takes on when it interact with the business system is represented by an Actor. For instance, an actor can be a customer, a business partner, a supplier, or another business system. Every actor has a name.
Use Case: Use cases describe the relationship between the system and the actor during the execution of business processes.
Association : An association is a Relationship between an actor and a use case. An association indicates that an actor can carry out a use case.
Association between actor and usecase
Include Relationships: An include relationship is a relationship between two use cases. It indicates that the use case to which the arrow points is included in the use case on the other side of the arrow. This makes it possible to reuse a use case in another use case.
Include Relationships between two usecase
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