Rankings
For the portions of the ranking that are determined by polls and computer-generated rankings, the BCS uses a series of Borda counts to arrive at its overall rankings. This is an example of using a voting system to generate a complete ordered list of winners from both human and computer-constructed votes. Obtaining a fair ranking system is a difficult mathematical problem and numerous algorithms have been proposed for ranking college football teams in particular. One example is the "random-walker rankings" studied by applied mathematicians Thomas Callaghan, Peter Mucha, and Mason Porter that employs the science of complex networks.
Read more about this topic: Bowl Championship Series