From The Plum Lines
Dr. Sheldon Goldman, a professor of political science at the University of Massachusetts who focuses on judicial nominations, has developed what he calls an “Index of Obstruction and Delay” designed to measure levels of obstructionism.
Goldman calculates his Index of Obstructionism and Delay by adding together the number of unconfirmed nominations, plus the number of nominations that took more than 180 days to confirm (not including nominations towards the end of a given Congress) and dividing that by the total number of nominations. During the last Congress, Goldman calculates, the Index of Obstructionism and Delay for Obama circuit court nominations was 0.9524.