Now begin the process of turning the requirements into functional models
• Models are logical; i.e., independent of how they are implemented (manual or computerized)
• Develop use-cases from the requirements
• Use-case: how a business system interacts with its environment
• Includes a diagram and a description to depict the discrete activities that the users perform
• Develop activity diagrams from the use-cases
• These model the business processes or how a business operates
• Used to illustrate the movement of objects (data) between activities