The quartile ranking method is based on the Impact Factors (IF) of publications from Science Citation Index (SCI) database. This ranking is published by the Journal Citation Reports (JCR) every year.
In which, Q1 denotes the top 25% of the IF distribution, Q2 for middle-high position (between top 50% and top 25%), Q3 middle-low position (top 75% to top 50%), and Q4 the lowest position (bottom 25% of the IF distribution).
How important is the use of this in assessing research proposals?