![]() ![]() more variants using intermediate elements of generalisation.keep only the association of the normal user to the general use case, and use a constraint on the deletion use case, to make clear that it requires the user to be superuser (this would be my preferred one, as it would allow also to get rid of the (too?) detailed uc):.Associate the normal user to the three specializations and the admin to the deletion only. keep the general use case without actors.If you would just have the CRUD cases inheriting from the more general Manage users, an Administrator could, by way of use case specialisation, also realize the more sensitive Delete user. Using Creately editor, you can change these colors as you wish. Adding a color theme to your use case diagram like the one below is a good way to appeal to viewers and add more clarity to the diagram. ![]() The right way to address this issue - if this level of detail is really desired - is to use generalisation on the use case side as well. Below is a use case diagram template of a financial trading system. You‘ll find more arguments in this other answer. Using the libraries of the Rapid UML Solution for ConceptDraw DIAGRAM you can create your own visual vector UML diagrams quick and easy.The «extend» approach is not suitable because it requires the use-case Manage users to add value on its own without any of the extensions. This sample shows the types of user’s interactions with the system and is used at the registration and working with the database system.Įxample 1. 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. 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). At the same time, the model does not reflect in any way how this set of actions will be implemented. The Create a New Address Book use case is initiated when the user chooses New from the File menu. In other words, each “use case” defines a certain set of actions performed by the system when interacting with an actor. In turn, the “use case” is a specification of the services (functions) that the system provides to the actor. In this case, an actor (acting person, actant, artist) is any object, subject, or system that interacts with a simulated system from the outside. 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”. When constructing a diagram, common notation elements can also be used: notes and extension mechanisms. This diagram consists of actors, use cases and relationships between them. The use case diagram (behavior scenarios, precedents) is the initial conceptual representation of the system during its design and development. ![]()
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