Glad you asked. It’s an extensive process. We actually wrote an article about it.
Course conditions are shared by consumers constantly. We strive for everyone to get the “A,B,C,D” method even though we don’t believe we have any “D”s. Occasionally courses are not up to standard but goal #1 is everyone plays a set of 4 with equal quality, driving distance and attempt to not have you on the same courses as years prior.
As far as which courses, if we have ample notice for a problem we can replace a course. But we’ll utilize any course which is part of our membership group and can maintain a certain level of standard. Sometimes those standards get past us and becomes out of our control.
Article for reference: