Because the line is very important. If not trained from the time he was attending college. Time to work, it would be irresponsible not punctual. Will have to practice a habit.
Because of late is very important. If you do not learn from the book. Time to go to work, they will not have the responsibility not to be on time, get in the habit of training.
Because of the line, it is very important if not trained since I was still in school when I go to work, they would not have the responsibility not to be punctual, you'll habit.