Delphi method

The Delphi method is a forecasting technique that seeks results from several iterative rounds of questionnaires sent to a panel of experts. The results of each round of questionnaires are shared with the group, with no indication of where the majority of opinions were stated in the previous round. The intent is to build a consensus as the experts share their knowledge about the selected topic. Also, there is no need to have a group meeting, which eliminates travel costs. However, response times can be quite long, since there is a wait time associated with each round of questionnaires.