Use case diagram

1. What is in a use case diagram?
2. What are the 4 main components of a use case diagram?
3. Why use a use case diagram?
4. What is a use case example?

What is in a use case diagram?

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. The use cases and actors in use-case diagrams describe what the system does and how the actors use it, but not how the system operates internally.

What are the 4 main components of a use case diagram?

UCDs have only 4 major elements: The actors that the system you are describing interacts with, the system itself, the use cases, or services, that the system knows how to perform, and the lines that represent relationships between these elements.

Why use a use case diagram?

The greatest advantage of a use case diagram is that it helps software developers and businesses design processes from a user's perspective. As a result, the system functions more efficiently and serves the user's goals.

What is a use case example?

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.