RAPID APPLICATIONS DEVELOPMENT

The RAD method has six key components: prototyping, iterative development, time boxing, highly skilled team members (both users and IS), top management support, and RAD (CASE) tools.

Prototyping creates a quick solution so that users can “discover” all the requirements. Plus, the prototype gives the developers a tangible product to show the user any proposed changes. Iterative development requires full lifecycle development; however, the amount of code is small enough that the overall schedule is reduced to weeks. Requirements not supported in the current release can quickly be added in subsequent releases.

Time boxing ensures high-value requirements are delivered early. One approach is to set a 1-week limit for each RAD session and prototype release so that the team can begin to show results early while continuing to develop all the required features.

Having the right, highly skilled, and motivated team members – users and developers – is essential. Small teams with members performing multiple roles and assigned for the duration of the project are critical success factors.

Top management ensures the right team members and resources are available when and where the RAD team needs them. At times, senior management is directly involved when strategic decisions must be made. CASE tools are essential since capturing each deliverable once and re-using it wherever required can best be accomplished through integrated development tools.
Different methodologies are constantly being proposed; however, few have the long successful track record of the JAD/RAD methods.