NBA Ref Schedule

[brainbrian]

Does anyone know what goes into the NBA referee schedule or possibly know someone to ask about it? I'm looking into doing a university research project.

I've read they're divided into 4 groups of 15 officials each? I've heard they do not call more than 3 games a week but also heard they do back to back days. Do they try to visit every arena at least once during the season or anything like that? Or can't see the same team twice within two weeks or anything similar? Anything else that you may know of that goes into their scheduling?

Thanks.