Delphi is a method of combining the judgements of knowledgeable individuals. It is relevant when there is no determinate answers (eg., hard data or well established theory) available, but some persons (often called experts) have relevant information about the topic of concern. It is especially pertinent in the common case of disagreement among experts. In effect it is a procedure for aggregating the information know to the panel. The resultant group judgement is obviously no better than the composite information within the group. ADG is using this methodology in some research projects.
