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RPI, what it is and why the NCAA no longer uses it

MichaelRR

Redshirt Freshman
Mar 17, 2022
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"start by taking 25% of the team’s win percentage. Then, take 25% of the OOWP and, lastly, take 50% of the OWP as it pertains to the basketball team in question. Add all three of those figures together, and you will end up with the team’s RPI.

However, there is an extra step for calculating the RPI for college basketball. When calculating the team’s win percentage, you must factor the team’s home wins and losses by 0.6. Then, you will need to factor the team’s road wins and losses by 1.4. It adds a few extra calculations, but the formula is still very manageable."

For SOS you drop your own record, so its Opponents winning percentage times 2/3 plus Opponents opponents winning percentage times 1/3.

This is why none of the RPI calculations are worth much before the end of February, you have too many unknowns. and the results are rather skewed to ridiculous.

The NCAA a few years ago abandoned RPI for the most part and started using NET to compare teams on the bubble. https://www.ncaa.com/rankings/basketball-women/d1/ncaa-womens-basketball-net-rankings

The power rankings on the most popular RPI site are also far more reliable this time of year: http://www.realtimerpi.com/ncaab/college_Women_basketball_power_rankings.html
 
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