I had a manager who would take our call ins in the center. He would ask what time I would be in and I would tell him, "Finish metro at 5:00, 18 deliveries, 1 hour, break 20 minutes and drive in another 20 minutes. See you at 6:40". His answer would be see you at 6:10 and he would hang up. After a while I would give him the same litany and add 30 minutes MI time. One day he cornered me about this MI time and I told him that he always subtracted a half hour off of my ETA, so I added a half hour of MI (make it) time so when all was done I could make his ETA. I can't print his remarks, but after that he stopped asking me for my ETA.