Why Use Case Diagram in OOAD?

In the next video, you will learn what a use case diagram is and why you need it. Use Case diagram is a type of Behavioral Diagram and used for the requirement gathering.

In the previous video, you learnt why you need a use case diagram. As you saw that textual information is difficult to comprehend and easy to misinterpret. So this is not an efficient way to collect requirements as it can involve multiple iterations. Use Case diagram provides a better alternative to this approach where requirements are captured using visual diagrams which avoids confusion and ensure that nothing is missed out.

So now you know what a Use-Case Diagram is and why you need to use it. The Use Case diagram provide an better and more efficient way to collect requirements for you system.