The Delphi Technique: An Empirical Evaluation of the Optimal Number of Rounds

Abstract

The widespread use of the Delphi technique of decision making has led to many variations in format implementation by practioners and researchers. The classic Delphi typically includes four rounds of questionnaires and feedback. This study attempted to establish empirically the point of stability in a six-round Delphi. The results indicated that Delphi groups reached stability in their decision making after the fourth iteration, thereby providing empirical support for the length of the classic Delphi.