Suggest you read two papers that are in the Delphi Method: Techniques and applications 1975 by Linstone and Turoff which is on my web site http://is.njit.edu/turoff The two papers are: in Chapter 2 Philosophical and Methodological Foundations of Delphi Ian A. Mitroff and Murray Turoff (68k) in chapter 3 The Policy Delphi Murray Turoff (60k) There are some current operative collaborative systems and i can send you or anyone else a recent paper if you wish that references them for disclosing disagreements for discussion purposes. Turoff, Murray (2009), The Past, Present, and Future of Delphi, In: FUTURA, The Quarterly Journal of the Finnish Society for Futures Studies, ISSN 0785-5494 Helsinki, pp 32-44. -- Distinguished Professor Emeritus Information Systems, NJIT homepage: http://is.njit.edu/turoff