I2

1.4 During a particular 40-hour week of an automated production operation, 336 acceptable (non-defective) parts and 22 defective parts were produced. The operation cycle consists of a processing time of 5.73 min and a part handling time of 0.38 min. Every 60 parts, a tool change is performed, and this takes 7.2 min. The machine experienced several breakdowns during the week. Determine: (a) hourly production rate of acceptable parts, (b) scrap rate, and (c) availability (proportion uptime) of the machine during this week