Delphi

The Delphi method functions as a structured communication technique for forecasting and decision-making. This approach employs a panel of experts who participate in multiple question-response rounds. After each round, researchers summarise and share responses with the group, enabling experts to refine their answers based on collective feedback. This iterative process aims to reach consensus or the most accurate forecast.

The method addresses complex problems or questions where precise measurement is difficult and expert judgment becomes necessary

Considerations

Maintaining anonymity among participants can minimise groupthink and allow independent consideration before convergence towards consensus.

Key Applications and Variants

  • Classical Delphi: focuses on fact-finding and consensus building
  • Policy Delphi: emphasises generating contrasting viewpoints on policy issues
  • Decision Delphi: structures decision-making for urgent problems
  • Real-time Delphi: conducts the process synchronously, often computer-assisted
  • e-Delphi: utilises online platforms for asynchronous communication

References

Schifano, Julia, and Marlen Niederberger. “How Delphi Studies in the Health Sciences Find Consensus: A Scoping Review.” Systematic Reviews 14, no. 1 (2025): 14. https://doi.org/10/g9htkn.

Veugelers, Rebekka, Menno I. Gaakeer, Peter Patka, and Robbert Huijsman. “Improving Design Choices in Delphi Studies in Medicine: The Case of an Exemplary Physician Multi-Round Panel Study with 100% Response.” BMC Medical Research Methodology 20, no. 1 (2020): 156. https://doi.org/10/gm6fq4.


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