Answers:
It is a technique in which a series of questions is individually
asked to a jury of experts about their perceptions of future events. In this
technique, direct interaction among the members of the group during
decision-making is avoided; as it could result in reaching an unfair consensus
due to dominant personality factors. Alternatively, the estimation and
associated arguments are summarised by a third party and responses, in
conjunction with the added questions, are sent back to the experts. This process
is repeated until a consensus is reached and used for long-term forecasting.