A group of people who do not communicate with one another as they make decisions or forecasts. Such groups are used in the Delphi technique, as described by Rowe and Wright (2001).

• Rowe, G. & G. Wright (2001), “Expert opinions in forecasting: Role of the Delphi technique,” in J. S. Armstrong (ed.), Principles of Forecasting. Norwell, MA: Kluwer Academic Press.