Leaving work a hr early or more and run into some unexpected traffic or situation on the high way and you dont show up with in that 15 min window before your shift start but u show on time and you still get a write up.Thats very stressful when you tried your best and went over and beyond your efforts to make it to work at your expected time.Then your mangers talk to you like crap about why YOU didn't make on time.What a headache.