Somewhere on these boards someone posted a formula for what they do based on the ratings of the players. You can probably do a search and find it. It seemed to get good reviews. As a stats only player it isn't as cut and dry. I refer to this chart from the manual frequently.
https://manuals.ootpdevelopments.com...er_development
I especially pay attention to the part about "challenge" where it reads: Players respond differently to challenges. Often, a player who is tearing up Double A hitting might not be developing very quickly, because he isn't being challenged. Similarly, putting an overmatched rookie into your major league starting lineup could actually hurt his development.
I have learned to become a complete micro-manger of my minor leagues because of this. Mistakes I feel I have made in the past (Since I don't have ratings on, I don't know if they are in fact mistakes) is leaving a guy at a minor league level because he was tearing it up and I thought that was good for his confidence. My new theory is to take that guy, even if he has only about a hundred at bats or 50.0 IP and move him up a level until I find that spot where he is being challenged. Since I try to draft high work ethic guys I am hoping that I am doing right by them. I should also say that a player has to be absolutely getting torched for me to drop him back down a level. In my mind I already know what he can do at that lower level. So if he can't hack it where he is, then he probably is a bust anyway. The exception would be the high school drafted kids. If a 19 year old is doing well in "A" ball but is getting exposed in "AA" then I would dial him back. He is still so young that he can still catch a development boost. However, in that same scenario with a guy at 23 years of age I'm not so accommodating.
In all, if you are into micro-managing you will develop a system that you are comfortable with.....then you will get upset and change it.
