You really don't need GPS to find lazy workers look for vans that make or lose oil, cleaners and filters. Look at those work orders do the hour meters seem erratic and sometimes run backwards? Will it keep techs inline not if they leave their van at a customers and drive something else or just unhook it. I have witnessed this at several dealerships. It is known who the slackers are they just really do not want to deal with the situation so they try GPS