How RPI is calculated so we can all get it straight

[IowaHawkeye2010]

I notice a lot of people on here throwing stuff out about what helps or hurts us for our RPI. The formula is as follows:
RPI = (WP * 0.25) + (OWP * 0.50) + (OOWP * 0.25)

WP is our winning percentage
OWP is our opponents winning percentage (Not counting the game played against the team you are calculating for such as Iowa in our case)
OOWP is our opponents opponents winning percentage
***There is also a 1.4 multiplier for home losses or road wins. A 0.6 multiplier for home wins or road losses. Neutral site is 1.

The way we appear in the RPI is based solely on this calculated RPI value

Another thing that gets reported in an RPI breakdown is SOS but this value has no multiplier effect of any sort on the RPI value determined above. The forumulat for SOS is:
SOS = 2/3*OWP + 1/3*OOWP

Please remember this as you start talking about who we want to win or what needs to happen.

 

[aaronzuriel]

Thanks for the definitions. The major problem that I see with the RPI are the multipliers for home losses and road wins. The second problem is their is no factor for actual competitiveness for each win or loss, ie how close where your wins or losses.

Obviously Iowa has been in every game in the Big Ten except for MI loss. Along with that, at least half of their wins have been blow outs or pretty comfortable.

No matter what it's still in the Hawkeyes' hands... win at least 4 more and they will be in.

 

[IowaHawkeye2010]

I agree. RPI is a dead system and doesn't take into account any advanced metrics like KenPom and Sagarin do. Anyone want to venture to guess who the committee chairman was when the multipliers were first agreed upon.