

S-Rank
Programs are ranked highly if they are strong in the criteria that faculty say are most important to program quality (i.e., don't ask faculty to rate programs directly, instead ask them which criteria are important to program quality and then rank programs based on the actual data for those criteria).

R-Rank
Programs are ranked highly if they have similar features to programs that faculty rate highly (i.e., ask faculty to rate programs directly, then rank programs based on the similarity of their data to the data of highly rated programs).

Research Rank
Rank based on faculty publications, citation rates, grants, and awards.