3.3.5 Modalities of data collection

Delphi could be administrated ‘paper-and-pencil’ by mail or e-mail.

Online Delphi’s are more and more carried out. Software is available to support the data collection and the analysis (Delphi_Survey_Web (DSW)¹⁰⁰, Mesydel©¹⁰¹)

The number of rounds is not necessarily defined a priori (often because of budgetary, time or human resources limitations): data collection must stop when the saturation or the consensus is reached.