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Delphi (also known as policy delphi) reaches consensus by asking a small group of experts to give advice. The results can generate further discussion at committee or public meetings. The delphi process begins when an agency distributes questionnaires to a panel of experts, whose responses are then tabulated. Results are sent back to the panelists, who reflect on their colleagues' opinions and either alter their stances or provide reasons for holding to their own positions. This process is continued until basic concepts and elements of a project or plan are identified by a majority.

The Atlanta Regional Commission (ARC) conducted a delphi process to define critical issues facing the region and to suggest possibilities for the future. These findings were presented at ARC's Outlook Conference in May 1992 to launch the VISION 2020 public process. Delphi is considered a survey technique as well as a way of involving small groups.

From the website of the Federal Highway Administration of the U.S. Department of Transportation.

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