Can time be an actor in use case diagram?
Yes time is a factor that can be modeled but the way the instructor is going about it seems a stretch to me because time itself does not care what happens when, it just is. He is over generalizing in an attempt to fit all types of use cases into his concept of modeling.
What is actor and use case in use case diagram?
A use case must yield an observable result that is of value to the user of the system. An actor represents a role of a user that interacts with the system that you are modeling. The user can be a human user, an organization, a machine, or another external system.
What is an actor in a use case?
Use case diagram components Actors: The users that interact with a system. An actor can be a person, an organization, or an outside system that interacts with your application or system. They must be external objects that produce or consume data.
Can a use case have 2 actors?
Association Between Actor and Use Case An actor must be associated with at least one use case. An actor can be associated with multiple use cases. Multiple actors can be associated with a single use case.
Can a use case diagram have only one actor?
Yes, there always can be more than one primary actor in an Use Case. Actor is nothing but who interacts with the system and at times even a system can be an actor. There is no limitation in number of actors within a use case. It is encouraged to use as much as it is possible in order to depict the domain more detailed.
How would you pick actors for a use case diagram?
Identify Candidate Actors for Use Cases Define each candidate actor by naming it and writing a brief description. Includes the actor’s area of responsibility and the goals that the actor will attempt to accomplish when using the system. Eliminate actor candidates who do not have any goals.
What is the difference between UML actor and UML profile?
What is the difference between a UML actor and a UML profile? A UML actor models an entity that interacts with a system object and a UML profile provides a way of extending an existing model to other domains or platforms.
Can there be only one actor in use case diagram?
Yes, there always can be more than one primary actor in an Use Case. Actor is nothing but who interacts with the system and at times even a system can be an actor. There is no limitation in number of actors within a use case.
Can an actor be both primary and secondary?
A primary actor is capable to execute actions within the use case. The same user can have different roles. Those different roles can be primary and secondary actor for a certain use case.
How detailed should a use case be?
A use case should be fairly discrete. It should describe the sequence of steps (and all necessary variations) for accomplishing one specific user goal, such as creating an account or sending an email or generating a report.