When I developed the original if-then playcalling list back in 2008, the list was based on conversations with several of the Johnson family of coaches.
Since then, the process has been greatly oversimplified.
This is all proven through quantitative data analysis of Army, Navy, and Georgia Tech throughout the 2018 season, all of which is found on this website.
Any questions, call me at +15703320265. God bless. –Dr. Cella