Business process
Define what is done in a business, by whom, in which order and with what consequences
Business rules
Constrain how a business is run. They are not specific to any project but they influence each projects development. Includes policies, physical laws, government laws etc.
Validation of business rules
Ensures the rules are what are required by the customer they are validated by reviewing them with stakeholders.
Benefits of prototyping
Helps with the design of the user interface
Gets users involved
Helps minimise misunderstanding between user and developers
May allow early detection of possible problems
Should be tested by the user