Delphi -

The technique is defined by several unique features that distinguish it from standard focus groups:

: Experts respond individually and their identities are typically kept from one another, which helps prevent the "halo effect" where high-ranking members might unfairly influence others. Delphi

: The survey is conducted in at least two rounds (rarely more than three), allowing participants to see group results and refine their opinions. The technique is defined by several unique features

: After each round, a facilitator provides a summary of the group’s views, enabling experts to reconsider their judgments based on the collective reasoning. Delphi