Q. Explain about Delphi method?

Delphi method: This is a systematic, interactive forecasting method that depends on a panel of experts. Experts answer questionnaires in two or more rounds. After every round, a facilitator provides an anonymous summary of the experts' forecasts from the previous round and the reasons they provided for their judgments. So experts are encouraged to revise their earlier answers in light of the replies of other members of their panel. It is supposed that during this process the range of the answers will reduce and the group would converge in the direction of 'correct' answer. Lastly, the process is stopped after a pre-defined stop criterion (for example number of rounds, achievement of consensus and stability of results) and mean or median scores of the final rounds determine the results.