It is common that when more three or more experts meet, there will be three or more sharply divergent opinions particularly if a lot of subjective elements are involved. Arguments can quickly become acrimonious, and at times, even personal and bitter, which has the effect of clouding the main issue.
Sometimes the eccentric views of some eloquent speakers will receive undue appreciation, while the more informed views of less gifted speakers may be brushed aside. This is where a technique like the Delphi will help to reach a properly thought-out consensus opinion among experts because all comments are made anonymously.
Because there is no need for a physical meeting of the participants, this method lends itself well to those that work with virtual teams or teams that are spread out geographically. Participants can take part in the panel via e-mail, instant messaging or text messaging depending on which method best suits the desires of the facilitator.
The benefits for project managers are it eliminates the controversy that can happen when a team member refuses to budge from a pet theory or belief, it streamlines the project flow and it facilitates better communication with all team members.