RAD

A software model that favors fast prototyping and iteration over heavy up-front planning.

RAD is a development methodology that builds working prototypes quickly and refines them through user feedback, trading extensive up-front design for speed and adaptability. The security concern is that rushing iterations can skip threat modeling, code review, and testing, so security must be built into each cycle rather than bolted on later. It contrasts with sequential models like Waterfall and aligns more with Agile thinking. On the exam, treat RAD as one of the named software development methodologies whose pace must not bypass secure development practices.