A Wideband Delphi session begins with defining and scoping the problem. Large problems are broken down into manageable portions that can be estimated more accurately, perhaps by different teams. The person who initiated the estimation activity assembles a problem specification that will give the participants enough information to produce informed, credible estimates.

The estimation participants include a moderator who plans and coordinates the activity, the project manager, and two to four other estimators. The moderator should be informed enough to participate as an estimator, but the moderator acts as an impartial facilitator who won’t skew the results with his own biases or insights. The moderator and project manager select participants who understand the problem or project and the associated estimation issues.