Suppose an operator is assigned three machines, the work shift begins at 8a.m., a 15-minute break occurs at 9:45a.m., a 30-minute lunch break occurs at 11:45a.m., a 15-minute break occurs at 2p.m., and the shift ends at 4p.m. When breaks occur, all machines are stopped. Parts cannot be partially machined when machines are stopped. Hence, transient conditions exist when machines are started and when machines are stopped. How many parts are produced per shift? Under steady-state conditions, how many parts would be produced during an eight-hour period?