It’s not calculus, I’m just talking about the day to day. If they decided during the season that it might be Bill’s last year then they would’ve tasked Glaser with trying to map out what is going on in general in the building and why. She doesn’t need to know everything but if she was able to get some basic level of understanding of what they were doing, when and approximately for what reason some of the time, she would then be able to compare and contrast that against what Mayo does in his role. If he does something drastically different that doesn’t work, or if he hits a roadblock, she would be able to advise on what she observed previously as a potential avenue to help. This is just one leg of the role, I’m sure.
I’m sure there are other people who can advise him and maybe they will hire some (McDaniels?) but it’s a start.