How to Create a Use Case Diagram

Summary

This video tutorial demonstrates how to create a use case diagram using Lucidchart. The presenter logs into Lucidchart, selects a blank document, and sets up the appropriate UML shape palette. The example used for modeling is a food truck website for 'Paradise Donuts,' where customers can browse donut varieties, view the truck's location, and submit catering requests. Employees can update the truck's location. The video guides users through connecting actors (customers and employees) to their respective actions, creating a complete use case diagram to model user interactions with the system.

Takeaways

• 💻 The speaker demonstrates how to create a use case diagram using Lucidchart.
• 📝 First, they log into Lucidchart, select 'New', and choose a blank document for a workspace.
• 🔍 They open the shapes palette by clicking 'plus shapes', typing 'UML', and selecting 'use case diagram' shapes.
• 🍩 The example system being modeled is a website for a food truck called 'Paradise Donuts' that offers Polynesian-themed donuts.
• 👥 Two actors (users) are identified for the website: 'Customer' and 'Employee'.
• 🍽 Customers will be able to browse donut varieties, view the truck location, and submit catering requests.
• 📍 Employees will update the truck's location on the website as it changes daily.
• 🔗 The diagram shows connections between actors and use cases, indicating what actions each actor can perform.
• 🖱 The speaker demonstrates how to draw connecting lines between actors and their respective use cases in Lucidchart.
• 📊 The diagram can be used for various applications, including internal business software or desktop applications, to illustrate user functionality.

Q & A

What tool is being used to create the use case diagram in the script?

The tool used to create the use case diagram is Lucidchart.

What is the first step after logging into Lucidchart?

The first step after logging into Lucidchart is to click 'New' and select 'Blank Document' to create a blank workspace.

How do you access the correct shape palette for creating a use case diagram?

To access the correct shape palette, click on 'Plus Shapes', type 'UML', and select 'Use Case Diagram' from the UML options.

What system is being modeled in the example use case diagram?

The system being modeled is a food truck website for 'Paradise Donuts', which serves Polynesian-themed donuts.

What features does the customer need on the food truck website?

The customer needs to be able to browse donut varieties, view the truck's location, and submit catering requests.

What functionality does the employee require on the website?

The employee needs to be able to update the truck’s location on the website.

How do you connect an actor to a use case in the diagram?

You hover over the actor's hand until a red circle appears, then drag it to the use case to show that the actor can perform that function.

What does the final use case diagram show in this example?

The final use case diagram shows that the customer can browse donut varieties, view the truck location, and submit catering requests, while the employee can update the truck location.

What can this type of use case diagram be used for?

This type of use case diagram can be used for modeling functions in various applications, such as mobile apps, internal business software, or desktop applications.

Can you modify the connecting lines between actors and use cases in Lucidchart?

Yes, you can modify the connecting lines by selecting the line and adjusting the line options to make it straighter if needed.