What are JAD and RAD, and how do they differ from traditional fact-finding methods? What are the main advantages of team-based methods?

Question

What will be an ideal response?

Answer 1

JAD (joint application development) refers to a team of users, managers, and IT professionals that work together to analyze the existing system, work on potential solutions, and develop the requirements for new systems. JAD can be more expensive than traditional methods, and if the team is too large for the project, then the JAD process can be cumbersome. The wide range of inputs and interaction among the participants in JAD can result in a more accurate assessment of system requirements, better understanding of goals, and stronger commitment to the success of the new system.
Like JAD, RAD (Rapid application development) uses a group approach, but goes much further. While JAD focuses on the requirements modeling process, RAD is a complete methodology, with a four-phase life cycle that parallels the traditional SDLC phases. The end product of RAD is the new information system. Companies use RAD to reduce cost and system development time, as well as increase the probability of success.
RAD relies heavily on prototyping and user involvement. Users can examine a working model as early as possible, determine if it meets their needs, and suggest necessary changes by using the RAD process. Based on user input, the prototype is modified, and the interactive process continues until the system completely is developed and users are satisfied. The RAD model consists of four phases: requirements planning, user design, construction, and cutover.