The Plus-One system was a suggested modification to the process used by the Bowl Championship Series (BCS) to determine a national champion in college football.
During the BCS era, several of the top-ranked teams in Division I-A (later renamed FBS) were matched in several bowl games, including the top two teams competing in a national championship game.
BCS rankings relied on a combination of polls and computer selection methods to determine relative team rankings, and to identify the top two teams to play in the championship game.
Alternate proposals arose due to criticism of BCS rankings, as "the computers held too much power.
There were several variants proposed, each of which involved staging a championship game based on the outcome of other bowls: A Plus-One system was never adopted during the BCS era, and the suggestion became moot via introduction of the College Football Playoff (CFP) in the 2014 season.