Delphi Survey

The Delphi method allows for a reliable and creative exploration of ideas or the production of suitable information for decision-making. It is based on a structured process for collecting and distilling knowledge from a group of experts through a series of questionnaires combined with controlled opinion feedback (Adler and Ziglio, 1996).


Between October 2014 and February 2015, three questionnaires were issued to 334 panellist identified as experts in the fields of survey methodology, children and youth, well-being, and policy. Response rate were very good, ranging from 75% in the first questionnaire, to 58.9% in the second and 61.7% in the third one.