It has since been adapted across many industries to estimate many kinds of tasks, ranging from statistical data collection results to sales and marketing forecasts.
According to the Project Management Institute, Wideband Delphi is an "estimating method in which subject matter experts go through multiple rounds of producing estimates individually, with a team discussion after each round, until a consensus is achieved.
"[2] Barry Boehm and John A. Farquhar originated the Wideband variant of the Delphi method in the 1970s.
Boehm's original steps from this book were: A variant of Wideband Delphi was developed by Neil Potter and Mary Sakry of The Process Group.
In this process, a project manager selects a moderator and an estimation team with three to seven members.