Dynamic Systems Development Method (DSDM), Rapid Application Development (RAD) and incremental prototyping have been in use as development methods for many years. The fundamental purpose of RAD/DSDM is to produce working systems, which are delivered with high speed, high quality, and low cost. DSDM is one approach to building and maintaining computer systems, which combine effective, use of tools and techniques, incremental prototyping, and tight project delivery timescales.