The Delphi process is an established business methodology implemented by the Rand Corporation in the 1950s, originally to forecast the impact of technology on warfare. The method entails a group of experts who anonymously reply to questionnaires and subsequently receive feedback in the form of a statistical representation of the "group response," after which the process repeats itself. The goal is to reduce the range of responses and arrive at something closer to expert consensus. The Delphi Method has been widely adopted today.
It is a useful method for achieving an improved documented understanding of a predictive set of statements that would otherwise require extensive, time consuming and expensive clinical or iterative research. It is also a fantastic process for prioritising resources into an area that could require focused research in a more economic and productive way.