My steward says in order to get a guarantee eight hours day I must arrive on time and be ready to work. Problem is this the month of February and hours have been changed to later time later in the week. We have been told that you need to ask for eight hours daily on the shorter schedule time. Then the supervisor needs to find some additional work. Some days the work runs out and getting eight hours seems impossible. How do you grieve a guarantee eight hours if your not sure if the steward will file a grievance at your location that you work. Any sound advice will be appreciated.