Important events majors, wgc, players, probably determine the first step of many top players schedules
There are some with contractual obligation events
The invitationals (Palmer, Memorial, colonial, soon to be Tiger at Riviera) probably have less gravitas, but still probably get looked at.
By then, a top player has a lot of his schedule filled, and then looks at courses he likes or plays well to fill a schedule that fits goals.
For me as a lower level exempt guy. The big events I might have been in and the courses I liked/played well set the majority of my schedule. I didn’t want to play more than three in a row so those events would help me determine the core schedule and I’d fill around them. I’d add if qualified for say the opens, or felt I needed to play.
I also had events I played terribly that I’d schedule around.
Then there are guys like Funk.....there schedule was...yup, I’ll play....all of them