Quote:
Originally Posted by Basel A
This also explains the potential for negative OPR in a category. Such a team might have a negative teleop OPR.
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Correct. Negative OPRs are much more rare now that penalties get added to the other teams score, but they do occur (sometimes for just reasons, sometimes not).
The phenomenon I talked about above is similar to what can occur with the +/- system in basketball. Sometimes a superstar doesn't score a lot of points due to getting double-teamed but his open teammates then score a bunch of points. If you only look at stats, it doesn't tell the whole story.
FRC 33 uses OPR to figure out schedule strength and to double check some of our Stats data. Ultimately I trust the stats more than I do OPR, but especially this year, I found a handful of errors in our scouting team data.
Like Citrus Dad, I generally found OPR to be within 15% of a teams average contribution. However there would be several teams with large deltas. Often this was due to a team not working for a while and then hitting a whole bunch of points. FCS teams would also create havoc in OPR. They would have a 80 point match, and then a 20 point match. Then and 80, then a 20... OPR math depends on a team being reasonably consistent. This behaviour will either dramatically over-predict or under predict...