The Aikman Ratings measure seven different categories of performance on both Offense and Defense. Devised by Troy Aikman in 2005 and compiled by Sportsradar, they provide a better measure of the qualities that win football games than simply total yards gained, the method used by the NFL to rank offenses and defenses. Originally designed where a score of 75 would be the average on both Offense and Defense, the swing towards Offense since has made a score above 80 the mean on that side of the ball while 70 has been an average Defense in recent years.
The seven categories are Offensive Points (20%), Red-Zone Efficiency as measured by Points Per Red-Zone Possession (20%), Turnovers (20%), Yards per Rush (10%), Yards per Pass (10%), Third-Down Percentage (10%) and First Downs (10%).