单选题
The traditional model for systems development was that an
IT department used ______ which is a process-centered technique, and consulted
users only when their input or approval was needed. Compared with traditional
methods, many companies find that JAD allows ______ to participate effectively
in the requirements modeling process. When properly used, JAD can result in a
more accurate statement of system requirements, a beret understanding of common
goals, and a stronger commitment to the success of the new system. RAD is a
______ technique that speeds up information systems development and produces a
functioning information system. While the end product of JAD is a(an) ______，the
end product of RAD is the new information system. The RAD model consists of four
phases. During the ______, users interact with systems analysts and develop
models and prototypes that represent all system processes, outputs, and
inputs.