If one reads the paper most commonly cited as the source of the waterfall methodology he or she will discover that the author of the paper recommends doing some

If one reads the paper most commonly cited as the source of the waterfall methodology he or she will discover that the author of the paper recommends doing something akin to prototyping before designing the real program. The paper is actually a critique of the process now commonly referred to as waterfall and the author does not recommend using the process as first presented in the critique.