Gonna back up urbanknight on this, when I started 22 years ago it was expected to have a bike ready to ride out the door in 20 min max, during the winter when I might spend the day doing nothing but a schwinn frontier, raleigh c30, trek 700 or something similar the first two were expected to be slower as I made sure I knew the idiosyncrasies of the bike(every c30/sc30 one year needed every cup and cone BB readjusted) and then it was expected that I would have them completely ready to ride in 15 min and the top goal was 5 an hour. Even last summer when I did some bikes, 20min for an entry level disc bike out the door wasn't all that big a deal. If you know what you're doing what to look for and how to evaluate and you're doing well over 20 bikes a day, it isn't hard to get it done and get it good.