<P> The rating percentage index , commonly known as the RPI , is a quantity used to rank sports teams based upon a team 's wins and losses and its strength of schedule . It is one of the sports rating systems by which NCAA basketball , baseball , softball , hockey , soccer , lacrosse , and volleyball teams are ranked . This system has been in use in college basketball since 1981 to aid in the selecting and seeding of teams appearing in the men 's playoffs ( see March Madness ) , and for the women 's tournament since its inception in 1982 . In its current formulation , the index comprises a team 's winning percentage ( 25 % ) , its opponents ' winning percentage ( 50 % ) , and the winning percentage of those opponents ' opponents ( 25 % ) . The opponents ' winning percentage and the winning percentage of those opponents ' opponents both comprise the strength of schedule ( SOS ) . Thus , the SOS accounts for 75 % of the RPI calculation and is 2 / 3 its opponents ' winning percentage and 1 / 3 its opponents ' opponents ' winning percentages . </P>
<P> The rating percentage index , commonly known as the RPI , is a quantity used to rank sports teams based upon a team 's wins and losses and its strength of schedule . It is one of the sports rating systems by which NCAA basketball , baseball , softball , hockey , soccer , lacrosse , and volleyball teams are ranked . This system has been in use in college basketball since 1981 to aid in the selecting and seeding of teams appearing in the men 's playoffs ( see March Madness ) , and for the women 's tournament since its inception in 1982 . In its current formulation , the index comprises a team 's winning percentage ( 25 % ) , its opponents ' winning percentage ( 50 % ) , and the winning percentage of those opponents ' opponents ( 25 % ) . The opponents ' winning percentage and the winning percentage of those opponents ' opponents both comprise the strength of schedule ( SOS ) . Thus , the SOS accounts for 75 % of the RPI calculation and is 2 / 3 its opponents ' winning percentage and 1 / 3 its opponents ' opponents ' winning percentages . </P>
how is strength of schedule calculated ncaa basketball
how is strength of schedule calculated ncaa basketball
The opponents ' winning percentage and the winning percentage of those opponents ' opponents
The opponents ' winning percentage and the winning percentage of those opponents ' opponents