What is UML Use Case Diagram: Symbols, Templates, Tool, and Tutorial

Do you desire to model the basic flow of an event, or do you want to organize and define functional requirements in a system? Then maybe you are talking about the Use Case diagram. This diagram is what you need to achieve your goal. In that case, this guidepost will provide you with everything you need to learn about the UML use case diagram. In addition, you will learn the basic methods to create this diagram. If you are eager to learn all these, you must read this article right now!

• Part 1. What is A UML Use Case Diagram
• Part 2. UML Use Case Diagram Symbols
• Part 3. UML Use Case Diagram Templates
• Part 4. Free Excellent UML Use Case Diagram Creator
• Part 5. How to Create UML Use Case Diagrams
• Part 6. FAQs about UML Use Case Diagram

Part 1. What is A UML Use Case Diagram

Use case diagrams aid in capturing system requirements and depict a system's behavior in UML. The scope and high-level functions of a system are described in use-case diagrams. The interactions between the actors and systems are also depicted in these diagrams. Use-case diagrams show what the system does and how the actors utilize it, but they do not show how the system works within. Moreover, the context and requirements of either the complete system or the critical components of the system are illustrated and defined through use-case diagrams. A single use-case diagram can represent a complicated system, or several use-case diagrams can represent its components. Use case diagrams are often created in the early stages of a project and are used as references throughout the development process.

◆ Before creating a project, you can make a use-case diagram to model a business. This way, all participants in the said project share an understanding of the business's customers, workers, and activities.

◆ Users can create a use case diagram to capture the system requirements. It is also to present to others what the system is capable of.

◆ A use case diagram is helpful during the analysis and design phase. It can indicate the classes that the system requires.

◆ Use-case diagrams are helpful in pinpointing system tests throughout the testing phase.

Part 2. UML Use Case Diagram Symbols

Here are the UML use case diagram symbols you can encounter and use when creating a UML use case diagram.

Actor

The actor designates a function performed by a user or any other system that engages with the topic.

Use Case

It is a set of instructions for completing a task that often describes interactions between an actor and a system.

Package

Elements are grouped using packages, which also provide namespaces for the grouped items.

Objects

Model pieces called objects represent instances of a class or classes.

Interfaces

Model elements called interfaces specify sets of operations that other elements, like classes or components, must implement.

Constraints

You can enhance the semantics of a UML model element using the extension technique known as constraints.

Note

It contains textual information or comments.

Part 3. UML Use Case Diagram Templates

You can see in this part the various and most commonly-used UML use case templates.

Book Publishing UML Use Case Template

This use case diagram shows the steps necessary to write and publish a book. This diagram can be inserted into your use case scenario to assist your team in publishing the next great hit, whether you're an author, agency, or retailer.

ATM UML Use Case Template

You can see below another example of a UML use case template. The template is about the ATM and its flow.

Broadcast System UML Use Case Template

Another template you can see is about the Broadcast system.

Part 4. Free Excellent UML Use Case Diagram Creator

Are you looking for a free UML use case diagram tool you can use? MindOnMap is the ideal tool for drawing a UML use case diagram. A top-notch web-based tool for mind mapping, creating presentations, graphics, different maps, etc., is MindOnMap. Creating a UML use case diagram with this tool is as simple as ABC. It provides several items you can use to build a diagram. It offers many forms, hues, themes, dividing lines, font types, and more. Also, the tool offers an intuitive interface for all users. It is not difficult to create a UML use case diagram because the steps are also trouble-free.

Moreover, MindOnMap has an automatic saving feature. The tool may automatically store your work while you work on the diagram to prevent data loss. If you save your final UML use case diagram, you may have more possibilities. The diagram can be exported into output formats, including DOC, PDF, SVG, JPG, and PNG. Also, you may share the output's URL with other people so they can edit the diagram, which will improve teamwork. Last but not least, any browser can utilize MindOnMap for free. Chrome, Firefox, Safari, Opera, Edge, and more platforms all support the tool.

Part 5. How to Create UML Use Case Diagrams

After knowing the most excellent UML use case diagram maker in the previous part, which is MindOnMap, you will now learn the UML use case diagram tutorial below.

Part 6. FAQs about UML Use Case Diagram