How do you write a use case diagram?

Table of Contents

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.

What is a UML use case diagram?

In UML, use-case diagrams model the behavior of a system and help to capture the requirements of the system. Use-case diagrams describe the high-level functions and scope of a system. These diagrams also identify the interactions between the system and its actors.

How do you represent use case notation in a UML diagram?

Use case diagram symbols and notation

Use cases: Horizontally shaped ovals that represent the different uses that a user might have.
Actors: Stick figures that represent the people actually employing the use cases.
Associations: A line between actors and use cases.

What is a use case examples?

It’s typically associated with software systems, but can be used in reference to any process. For example, imagine you’re a cook who has a goal of preparing a grilled cheese sandwich. The use case would describe through a series of written steps how the cook would go about preparing that sandwich.

What is use case with example?

A use case is a description of how a person who actually uses that process or system will accomplish a goal. It’s typically associated with software systems, but can be used in reference to any process. For example, imagine you’re a cook who has a goal of preparing a grilled cheese sandwich.

What are the symbols used in use-case diagrams?

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 should a use case include?

As mentioned, the three basic elements that make up a use case are actors, the system and the goal. Other additional elements to consider when writing a use case include: Stakeholders, or anybody with an interest or investment in how the system performs.

What are the elements of a use case?

Here are the core elements of a common use case:

The system. The system can describe the software or hardware a person operates to complete a task.
The actors.
The stakeholders.
The preconditions.
The trigger.
The normal flow of events.
The alternative flow of events.
The exception flows.