This course guides you through the process of deciding how your system should interact with all the elements in the context you identified. You will articulate what your system needs to do to successfully complete its use case using a tool called the Use Case Behavioral Diagram (UCBD). With the UCBD you will derive professional, functional requirements that describe what any valid solution must do throughout its use cases. Then you will develop the UCBD in a way that will meet your customers’ needs, but not so prescriptive that it prevents your team from using all of your talent in service of making your project a success.