Quote:
Originally Posted by Navid Shafa
OPR is never accurate at any event until each team has played at least 6-7 matches. It most definitely is a sample size issue.
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Until the number of matches is >= number of teams, the OPR system of equations is underdetermined.
Consider the equation a + b = 3, there are an infinite number of solutions. The same thing occurs when there are less matches then teams. Since there are 6 teams per match, opr is underdetermined until everyone has 6 matches.
At the championship, it will take until the middle of Friday before OPR is overdetermined.
FRC Tracker won't calculate OPR until the solution is overdetermined. Users of FRC Spyder and any other live OPR updating tool should definitely take OPR with a huge grain of salt until the solution is overdetermined.