The iterative model is a type of software development life cycle (SDLC) implementation that focuses on an initial, basic implementation that gradually adds more complexity and a broader feature set until the final system is complete.
A subset of the finished product that evolves from iteration to iteration to become the finished product or program. Iterative models include prototyping, Rational Unified Process (RUP), agile development, and rapid application development.
The iterative testing approach is a procedure in which a product is tested and tweaked repeatedly at various phases of development. The goal is to minimize or eliminate any issues affecting usability and user experience prior to the launch date.
The Iterative Model permits access to prior phases, when changes are made as needed. The product's final output is resurrected at the end of the Software Development Life Cycle (SDLC).
Produces functional software rapidly and early in the software life cycle. More adaptable - it is less expensive to adjust the scope and needs. A smaller iteration makes testing and debugging easier. Risk is easier to manage since dangerous components are detected and treated throughout iteration.