3.3.9 Practical aspects

• It is important to clearly explain the goal of the questionnaire and the way it will be analysed. The redaction of the invitation/introduction letter is thus crucial. “Stressing the practical policy application of the Delphi yield to experts panelists to aid their retention” (Rowe, 2011¹⁰², p. 1489).
• The research team should have managers skills to follow up the returned questionnaires and mailing.
• The utilization of online tools could be very useful as well for the research team (rapid results) as for the participants.
• While anonymity in the process of the Delphi is required, “using social rewards for recognition in participation, such as subsequently publishing panel membership listings” (Rowe, 2001¹⁰², p. 1489) could improve panelists recruitment and retention.