Key points are not available for this paper at this time.
The results show considerable differences in how Delphi studies are carried out, making assessments and comparisons between them difficult. Sometimes an approach points to unintended effects, or biases in the individual judgments of the respondents and, thus, in the overall results of Delphi studies. For this reason, we extrapolate suggestions for how certain comparability and quality assurance can be achieved for Delphi studies.
Spranger et al. (Tue,) studied this question.