The Annar Rankings are calculated by comparing yardage statistics of each team's games with the average yardage statistics from their opponents. The Annar Rankings do not care who won the game, what the score was, turnovers, injuries, game location, or special teams play. It's not a perfect system but can give some insights on the overall strenghth of teams assuming the turnovers average out and key players stay healthy. It is a very simple system and not meant to mimic the BCS or voter polls. Example: -Team A rushes for 157 yards against Team B -Team B gives up an average of 100 yards a game -Team A would get a rating of 57 for this game -Repeat this for all opponents of Team A and divide by the number of games and you get your Rushing Offense score. Team B's rushing defense average would obviously change as the season went on and the Annar Rankings are updated from the beginning of the season every week to reflect the new averages. The strength of every teams schedule is built in by the use of opponents averages. So rushing for 305 against LSU would boost your teams score much more than rushing for 305 yards against Utah State. In 2006 Michigan's rush defense was a 93, good for 1st in the nation. This means that, on average, Michigan would hold oppenents to 93 yards less on the ground then they usually got.