A
software engineering development model. The basic idea is that a series of
prototypes are generated until the developers
get it right. Specifically, it is a continuous cycle consisting of three steps:
Listen to the customer (because the customer is always right)
Build/revise a mock-up
Allow the customer to test drive the mock-up
It is useful in situations where a customer defines a set of general objectives for a piece of software but does not go into details.