A Delphi study is a consensus development process that gathers information
from the same group of people over several rounds of data collection. Usually,
the rounds are focused on a series of processes that build on each other:
1) brainstorming; 2) clarification and refinement; and 3) prioritization
based on one or more criteria of interest.
Delphi studies have traditionally taken place through the mail. Data collection
lasted several weeks and often resulted in participant attrition. We have
conducted both asynchronous and synchronous Delphi studies online. Both
strategies reduce the cost of mail-based efforts. Attrition can be reduced
through email reminders for asynchronous Delphi studies as well. Both attrition
and time is reduced through synchronous Delphi processes, where participants
meet online and fill out successive survey forms.