The Win-Win negotiation tool is a Unix workstation-based groupware support system that permits stakeholders to go into winning conditions, investigate their interactions, and negotiate joint agreements on the particulars of the new project being signed up. (WinWin Spiral Model) The spiral model merges the iterative character of prototyping with the organized and methodical features of the waterfall model, therein offering the possibility for quick development of incremental models of the software. In this model, the software is developed in a sequence of incremental releases with the initial stages being either paper models or prototypes. Later iterations become more and more full versions of the product. This model may have 6 steps: Customer communication; Planning; Risk analysis; Engineering; Construction and release and evaluation of the Customer. (the Spiral Model)

Accessed on 16 February 2005
Software Life Cycle Models" Retrieved at http://www.levela.com/software_life_cycles_swdoc.htm. Accessed on 16 February 2005

The Spiral Model" Retrieved at http://scitec.uwichill.edu.bb/cmp/online/cs22l/spiralmodel.htm. Accessed on 16 February 2005

What is the 'Spiral Model'?" (10 Oct 1998) Retrieved at http://www.faqs.org/faqs/software-eng/part1/section-4.html. Accessed on 16 February 2005

WinWin Spiral Model" Retrieved at http://sunset.usc.edu/research/WINWIN/winwinspiral.html. Accessed on 16 February 2005

The Spiral Model" Retrieved at http://scitec.uwichill.edu.bb/cmp/online/cs22l/spiralmodel.htm. Accessed on 16 February 2005