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uml 10+ actor diagram uml Rabu, 21 September 2022 Edit Hence if we look into the diagram then we will find three use cases Order SpecialOrder and NormalOrder and one actor which is the customer. A sequence diagram is a UML diagram type that represents how and in what order objects in a system interact with each other. Use Case Diagram • Elements - Actors - Use cases - Relations • Use case diagram shows relationship between actors and use cases 12 Use case Use case actor actor. Use Case Diagram Example 13 Repair - True of all UML diagrams. 53 Development Process • Requirements elicitation - High level capture of user/ system requirements Major elements of business use case diagram - business actor , business use case, business boundary , include and extend relationships. System Use Case Diagrams (System) Use case diagrams are used to specify: (external) requirements, required usages of a system under design or analysis ( subject ) - to capture what the system is supposed to do; An actor in the Unified Modeling Language (UML) "specifies a role played by a user or any other system that interacts with the subject." [1] "An Actor models a type of role played by an entity that interacts with the subject (e.g., by exchanging signals and data), but which is external to the subject." [1] The Actor in the UML In UML, an actor is a model element that interacts with a system. As a model element, it can be an abstract person (e.g. "customer") or another external system. In the practice of modeling it is recommended to define the role unambiguously with stereotypes - e.g. "User", "Stakehoder" or "External System".