The original waterfall spec. describes the usage of prototypes. I wrote a small review of it a few weeks ago: http://emtrics.com/2011/10/17/software-development

The original waterfall spec. describes the usage of prototypes. I wrote a small review of it a few weeks ago: http://emtrics.com/2011/10/17/software-development-a-little-bit-of-history/ http://emtrics.com/2011/10/17/software-development-a-little-...