Jimmy runs a business in his basement that spin aligns and marks golf balls with logos for tournaments. The automated machine goes through three serial steps; the first step takes 15 seconds, the second takes 20 seconds while the third takes 30 seconds. Once it is running there are three balls in the system at once flowing down the serial line. He runs the machine at night (20 hours/week) after doing his regular job as a postal worker.The capacity per hour of his machine is 120 balls/hr.
a) Last night he was able to run 327 balls in 4 hours. What was his efficiency?
b) If he produced 875 balls last week what was his utilization?