Body Shop Paint Measuring System

I am wondering if anyone knows of a system that monitors how much paint a painter mixes when painting lets say a hood or door etc.
Or lets say that a technician inputs what Year Make Model vehicle he is painting and what area such as a door or a qtr panel and the system would recommend approx how much paint he should be using.
I am trying to control waste in the B/S and it seems that there should be some system like this out there.
Any input is appreciated
Or lets say that a technician inputs what Year Make Model vehicle he is painting and what area such as a door or a qtr panel and the system would recommend approx how much paint he should be using.
I am trying to control waste in the B/S and it seems that there should be some system like this out there.
Any input is appreciated