The following data resulted from a study taken on a horizontal milling machine:
Pieces produced per cycle: 8.
Average measured cycle time: 8.36 minutes.
Average measured effort time per cycle: 4.62 minutes.
Average rapid traverse time: 0.08 minutes.
Average cutting time power feed: 3.66 minutes.
Performance rating: 115 percent.
Allowance (machine time): 10 percent.
Allowance (manual time): 15 percent.
The operator works on the job a full eight-hour day and produces 380 pieces. How many standard hours does the operator earn? What is her efficiency for the eight-hour day?