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Extend is a relationship that specifies how and when the behavior defined in optional (extending) use case can be inserted into the behavior defined in the extended use case.
Extended use case is meaningful/complete on its own. It is independent of the extending use case. Extendinguse case typically defines optional behavior that is not necessarily meaningful by itself.
See examples in the provided link.
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What do use-case diagrams depict?
Use case UML diagrams depict functionality (use cases) offered by a system (subject) from a point of view of external user (actor), what designed or existing system can or is supposed to do for external users of the system.See examples of use case diagrams in the related link.
Use case diagrams for online telephone billing?
yes
Sample Use Case Diagrams Payroll System?
can u prepare the use case diagram for simple payroll system?
What is Difference between include and extend in use case diagram?
the include relationship implies that the included use case must be enacted, whereas the extend relationship implies that the extending use case may be enacted.
What are use case diagrams?
A use case diagram shows the relationship between actors in a system and the use cases. An actor is a role, not a specific user; for example, Bill, Fred, and Jane may all be specific user's of an ATM but they all play the same role of a customer. A use case is functionality (a dialog) that an actor can have with the system.Use case diagrams are one of the UML diagrams used during the requirements analysis phase of a system. Use case diagrams are primarily used for the development of software systems, but as they can also be used to associate actors with manual processes outside of software systems.See the links below for a 4-part tutorial on use cases and use case diagrams.
What is the role of use case diagrams in systems analysis phase?
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What is the difference between use case model and use case diagram?
Use Case diagrams are behavior diagrams of UML used to describe a set of actions (Use Cases) that some system or systems (Subject) should or can perform in collaboration with one or more external users of the system (Actors).Each use case should provide some observable and valuable result to the actors or other stakeholders of the system.Use case diagrams are a means for specifying:(external) requirements on a system under design, required usages of a system - to capture what a system is supposed to do;the functionality offered by existing system -- what system can do for clients;requirements the specified system poses on its environment - by defining how environment should interact with the system so that it will be able to perform its services.
What information is provided by use cases or a use case diagram?
Use case diagrams are used foe better understanding of software. They have actors , use cases and relation between them.
What are three type of diagrams you use in electronics?
Wiring diagrams, schematic diagrams, layout diagrams, and logic diagrams.
What are the types of diagrams that UML supports?
UML 2.4 has 14 types of diagrams divided into two categories: Structure diagrams and Behavior diagrams.Structure diagrams show the static structure of the system and it's parts on different abstraction and implementation levels and how they are related to each other.Structure diagrams are:Class diagramObject diagramPackage diagramComponent diagramComposite structure diagramDeployment diagramProfile diagramBehavior diagrams show the dynamic behavior of the objects in a system, which can be described as a series of changes to the system over time.Behavior diagrams are:Use case diagramActivity diagramState machine diagramSequence diagramCommunication diagramInteraction overview diagramTiming diagramSequence diagram, Communication diagram, Interaction overview diagram, and Timing diagram are Interaction diagrams.Note, that though Use case diagram is Behavior diagram, it is also special case of Class diagrams (which are Structure diagrams).
Which UML diagram is known as run time diagram?
UML 2.4 has 14 types of diagrams: 7 structure diagrams and 7 behavior diagrams.Behavior diagrams show the dynamic behavior of the objects in a system, which can be described as a series of changes to the system over time.So any of the behavior diagrams could be called run time diagram (except probably use case diagrams).
What are the five groups of UML diagrams?
1-use case 2-edf 3-ghh 4-kmmmju 5-mj
