use case actors

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An actor specifies a role played by a user or any other system that interacts with the subject. This can be a single person or a group of people interacting with the process.

Types of actors used in the use case diagram:
1) Primary Actor: People who use the main system functions are referred to as primary actors. For example: in an ATM system primary actor is the customer
2) Secondary Actor: People who perform administrative or maintenance tasks are referred to as secondary actors. It provides a service to the system under design. For example: in an ATM system a person in charge of loading money into the system is a secondary actor.

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Actors is one of the most important terms in the UML diagram. normally use case used to visualize the picture to the technical team. use case is mainly used for user prospective only.to understand the flow of the system.

In the use case we have a primary and secondary actors are there.

see. Actors is nothing but the users who is interact with your system directly or indirectly.


Primary Actor:-

Primary actors are the actor who  is An actor represents a role of a user that interacts with the system that you are modeling.
and primary actors are always an left side of the system.

Secondary Actor:

secondary actors are the actor who is we can say supporting users to execute the particular use case.
an secondary actors are always an right side of the system.

this how the actors are the playing main role in the use case diagram.

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The Account Operations use case diagram identifies the key Actors and their roles within the system.
In use case diagrams, users of the system are represented as actors. Each actor plays a specific role in the system, called a use case.
Multiple actors can perform a use case. The actor can be a person, such as a customer, or a computer, such as a database system or a server.

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There are 2 types of actors

1. Primary Actors
2. Secondary Actors

Primary actor often triggers the use case but not always whereas the secondary actor never initiates the use case.

The primary actors are usually place on the left side of the diagram.The secondary actors are placed on the right side of the diagram.

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Actors is one of the most important terms in the UML diagram. normally use case used to visualize the picture to the technical team.
A primary actor :-
                               acts on the system
                               initiates an interaction with the system
                               uses the system to fulfill his/her goal

A secondary actor :-
                             is acted on/invoked/used by the system
                             helps the system to fulfills its goal

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In a use-case diagram, users of the system are depicted as actors. Each actor performs a specific role in the system, which is called a use-case. More than one actor can perform a single use-case. An actor can be a person, such as a customer, or a computer, such as a database system or server .Every use case contains three essential elements: The actor. The system user -- this can be a single person or a group of people interacting with the process

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 use-case diagrams model the behavior of a system and help to capture the requirements of the system. In use case diagram actor plays role of user which interacts with the system.
There are two types of actors-
1. Primary actor- Who use the system functionality.
2. Secondary actor- Who assist the system in achieving goal. They are external system or also humans providing services to the system
For example. In student admission system student who is register and administrator who admit the student are primary actors and the database containing student data and the payment processing system that generates bills for the students admission fees.