What are the symbols used in use case diagram?
In this lesson, we will look at five symbols used in a use case diagram:
- System Domain Box.
- Actor Figure.
- Goal Oval.
- Actor Initiator Arrow.
- Actor Connector Line.
What is a business use case example?
A business use case defines a sequence of actions that a business performs in order to produce observable results for an actor in that business. For example, if the business in question was a bank, the use case might capture how a customer would apply for a credit card, renew a contract, or pay an invoice.
How do you identify a business use case?
To identify use cases we will take the following steps:
- Step 1: Identify candidate system actors.
- Step 2: Identify the goals of the actors.
- Step 3: Identify the candidate use cases.
- Step 4: Identify the start point for each use case.
- Step 5: Identify the end point for each use case.
What is a business use case diagram?
Business Use Case diagrams show the interactions between business use cases and business actors. Business use cases represent the processes that a business performs, and business actors represent roles with which the business interacts, such as customers or vendors.
What are the elements of use cases?
Elements of a Use Case
- Actor – anyone or anything that performs a behavior (who is using the system)
- Stakeholder – someone or something with vested interests in the behavior of the system under discussion (SUD)
- Primary Actor – stakeholder who initiates an interaction with the system to achieve a goal.
What is the meaning of use cases?
A use case is a written description of how users will perform tasks on your website. It outlines, from a user’s point of view, a system’s behavior as it responds to a request. Each use case is represented as a sequence of simple steps, beginning with a user’s goal and ending when that goal is fulfilled.
How do you create a business use case diagram?
How to Draw a Use Case Diagram?
- Identify the Actors (role of users) of the system.
- For each category of users, identify all roles played by the users relevant to the system.
- Identify what are the users required the system to be performed to achieve these goals.
- Create use cases for every goal.
- Structure the use cases.
How are use case symbols similar to external entities?
Use Case Symbols. A use case diagram contains the actor and use case symbols, along with connecting lines. Actors are similar to external entities; they exist outside of the system. The term actor refers to a particular role of a user of the system.
What are the symbols in the use case diagram?
The last two symbols are the Actor Initiator Arrow and the Actor Connector Line. These are used to connect the actors to the goals. The line with an arrowhead is used for primary actors. The arrowhead communicates that the primary actor initiates interaction (knocks at the door) with the system boundary to achieve the user goal.
How are use case symbols similar to actors?
Use Case Symbols A use case diagram contains the actor and use case symbols, along with connecting lines. Actors are similar to external entities; they exist outside of the system. The term actor refers to a particular role of a user of the system.
How is a use case related to a business case?
Use-case should reflect user needs and goals, and should be initiated by an actor. Business, actors, Customers participating in the business use-case should be connected to the use-case by association.
