Need help Understanding INT and BLM

Hi all, feeling my car is very close but want to play around with the base pulse width table in 32b.
My question is: how does the computer determine INT and BLM numbers? Is it solely based on the O2 sensor? Running a 165 computer with a MAF system. The reason why I am asking this question is if the injector constant is off would that not effect INT and BLM because the computer doesn't know the proper injector constant? I hear a lot of people using the injector constant to richen or lean all across the board but wouldn't the INT and BLM be off? Doesn't the computer base it on the injector constant and O2 sensor? Or does it determine INT and BLM right off the base pulse width vs load table only?