Can someone explain to me how Saint Mary's RPI is 19 and they're a lock for the tourney? They haven't played ****, have one of the worst non-conference schedules I have ever seen, and the one team they've played with a pulse this year they get pounded every time. I don't get it? I also don't get how Nevada's RPI is 34 and UT Arlington's is 40? WTF? RPI may be the worst rating ever and it is heavily used by the committee....
Nobody uses a single rating from any system and runs with it. Again that goes for ANY rating system. A single high RPI rating only indicates that a team had a combination of high winning % and/or strong schedule with good winning %.
With any system, usually things are mined down from just the raw number.
1) What was the SOS, does it provide context to the rating
2) After SOS, bracket the schedule using the system. You can see home/road/neutral vs top 50/100/150 - a far clearer picture is established
3) with a clearer picture does any data stand out? "bad" losses, close wins/losses, success against tourney level teams, etc. and does it support the rating or contrast it. Other factors can be included like player injuries, eligibility, etc. to add more detail.
Without mining down, all systems become frail and teams like Saint Mary's escape scrutiny, while others get overlooked.