Requirements

Requirements

1. intended purpose of system

   • a contract between those developing the system and those commissioning the system

2. stakeholders

   • clients - pay for it
   • users
   • those who benefit from system
   • those who develop the system

3. need to be

   • necessary and traceable
   • non ambiguous and realistic
   • complete
   • consistent
   • verifiable
     • testable scenarios

4. analysis

   • discover new requirements
   • this becomes dominant later in process

5. elicitation

   • activity diagrams
   • use cases
   • what should the system be able to do
   • initially this is dominant