Error bar of OPR in Stronghold

[Brian Maher]

Relevant thread from last year.

Originally Posted by SpaceBiz

Plus or minus the some of the OPRs below zero gives you a good idea of the margin of error for lower levels of play.

I would be cautious about using this as a means of assessing error. It shouldn't be assumed that negative OPR indicates error. There are valid reasons for having a negative OPR: it means that, on average, that team causes their alliance partners to score worse than they otherwise have. This is especially likely during low levels of play, while drive teams are more clumsy and still learning how to stay out of partners' ways.

The consequence of negative OPR was more obvious last year, when it possible to undo any teleop scoring attempt up until the last second of the game by knocking over stacks, but it is mathematically sound for it to happen this year as well. Teams can end up with a negative OPR this year by being in the way of their partners' scoring attempts without scoring much themselves.

For example, say there's a team that doesn't score much and has a propensity for getting stuck under the low bar. Many teams use the low bar to quickly cycle and score goals. This team may prevent their partners from doing so, and from finishing damaging the low goal. If they score very little and this happens often enough with enough low bar cycler partners, there OPR will become a (deserved) negative number, because they contribute negatively to their scores.