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With regard to various reasons, the requirements analysis phase tend to be complete, consistent, accurate and fair statement of requirement is quite difficult to entry basic needs of a good number of explanations, on the rapidly ensure it is "to achieve", a prototype feedback to improve the system know and meet that basic requirements regarding users, allowing users that they are inspired in that trial process, the instructions to the demand for additional and much more precise, eliminating uncoordinated system requirements, and slowly but surely establish the requirements, to obtain fair, consistent, unambiguous, complete and realistic declaration of requirement.

Rapid prototyping must be used again thinking another phases of software package development, software development into the whole process regarding expansion. That the expense of the first work with relatively small, shorter cycle development which has a simple, but it can circulate in the system prototype into the user try it or the user trial and as quickly as possible to clarify in addition to test some key design strategy, determined by this development in the software system.