Jimmy runs the business in his basement which spin aligns and marks golf balls with the logos for tournaments. The automated machine goes by the three serial steps; the 1st step takes 15 seconds, the 2nd takes 20 seconds while the 3rd takes 30 seconds. Once it is running there’re three balls in system at once flowing down serial line? He runs the machine at night (20 hours/week) after doing his regular job as the postal worker. The capacity per hour of his machine is 120 balls or hr.

a) Last night he was capable to run 327 balls in four hours. What was his efficiency?
b) If he manufactured 875 balls last week what was his utilization?