Table 3 Major terms used in the Delphi method
Term | Definition |
|---|---|
Mean | The sum of values in the panel members’ responses to each item is divided by the number of members. Stop criterion: mean value ≥4.0. |
Standard deviation | As a measure of dispersion, standard deviation indicates the degree of spread in the panel members’ responses from the mean value and is calculated as the square root of the deviation of each item. |
CVI | A valid percent of the panel members’ responses with a score of 4 or more (positive rate). Stop criterion CVI value ≥ .75 |
CV | As a measure of dispersion, CV refers to the degree of relative dispersion of the panel members’ responses and is calculated as the standard deviation divided by the mean. Stop criterion CV < .50 |