UML Use Case Diagram Example. Registration System
The use case diagram (behavior scenarios, precedents) is the initial conceptual representation of the system during its design and development. This diagram consists of actors, use cases and relationships between them. When constructing a diagram, common notation elements can also be used: notes and extension mechanisms.
The essence of this diagram is as follows: the designed system is represented as a set of actors interacting with the system using the so-called “use cases”. In this case, an actor (acting person, actant, artist) is any object, subject, or system that interacts with a simulated system from the outside. In turn, the “use case” is a specification of the services (functions) that the system provides to the actor. In other words, each “use case” defines a certain set of actions performed by the system when interacting with an actor. At the same time, the model does not reflect in any way how this set of actions will be implemented.
In the structural approach, the analogue of the use case diagram is IDEF0 and DFD diagrams, use-work options (IDEF0) and processes (DFD), and actors — external entities (DFD).
This sample was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the UML Use Case Diagram library of the Rapid UML Solution from the Software Development area of ConceptDraw Solution Park.
This sample shows the types of user’s interactions with the system and is used at the registration and working with the database system.
Example 1. Registration System. UML Use Case Diagram
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