Framework
The four defining features of the Delphi method
What separates a true Delphi study from asking some experts

The Delphi method is a structured way to reach expert consensus, developed at the RAND Corporation in the 1950s. Four structural features set it apart from simply asking experts what they think: anonymity, iteration, controlled feedback and a statistical group response. Use this as a checklist when you design a panel study or judge one you are reading.
Where this appears
What's in this framework
- Anonymity: Experts never know whose answer is whose, so ideas are judged on merit.
- Iteration: Several rounds give experts repeated chances to refine their views.
- Controlled feedback: Between rounds, an anonymized summary shows the median and spread.
- Statistical group response: The result is a median or mean and its range. Dissent stays visible.
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<p>Source: <a href="https://www.koji.so/visuals/delphi-method-four-defining-features">The four defining features of the Delphi method</a>, Koji</p>

