ABSTRACT
After the generation of idea, it will actually be designed. The traditional design process was straightforward from the upper stage to the lower stage. It is similar to the water stream from the upper reach to the lower reach and will never goes up the stream. This is the reason why traditional design process was called as the waterfall. But today, the design process has been changed to the iterative way because the fundamental deficiency that is detected early in the process can be corrected and the negative influence of the deficiency will be minimized. The most effective iteration is between the design stage and the evaluation stage.
