2. Introduction to Use Case Modelling

Using Event Analysis, we can figure out the key requirements and events that a system must perform in order to be a successful business project. Once we have a list of these requirements, it's time to model them in an effective manner. Many people may wonder why modelling is such an important aspect of system development, but there are many benefits that a use case model alone may provide (along with the benefits of other model types), including but not limited to:

• Provides a baseline for testing in terms of defining test plans and test cases
• Provides a tool for requirements traceability
• Provides a starting point for the identification of data objects or entities.

As you can see from this diagram, Use Case Diagrams are the foundation for every on model used within the system development life cycle. A use case diagram shows the main actions and actors of the system, which is then further specified within the other diagrams.

In summary, the use case diagram takes the events found in event analysis and creates a model depicting the events and the actors of the system. There are many benefits to modeling a use case diagram, and are widely used within the business environment.