A galvanized steel shackle requires machining on two different milling machines for operations A and B. a. How many milling machines, type A and B, are required to produce 13,000 shackles per month assuming the company will be operating 5 days a week, 9 hours per day under the machine performance in the table. Tool change and maintenance are done after production: Operation Standard Time Efficiency Reliability Defect Rate A 3 mins 95% 95% 3% B 5 mins 95% 90% 3% a. Draw the process diagram for this problem b. Total milling machines type A c. Total milling machines type B b. Compute the number of machines required if the company is considering two 9 hours shifts (instead of just one). a. Total machines type A b. Total machines type B c. Discuss what will happen to the number of milling machines required if the machines require a 30 minutes tool changes and maintenance after a every 500 parts. Your comments in at least 100 words.

Suppose that scrap costs are negligible, and rework costs are $2, $3, and $4, respec- tively. Calculate the rework cost for producing the 1,000 units. What happens to the re- work cost if the scrap rates on processes 1 and 3 are reversed? Does this result agree with that of Problem 2.13? 2.15 Part X requires machining on a milling machine (operations A and B are required). Find the number of machines required to produce 3000 parts per week. Assume the B company will be operating five days per week, 18 hours per day. The following infor- mation is known: Operation B Standard Time 3 min 5 min Efficiency 95% 95% Reliability 95% 90% Defect Rate 2% 5% Note: The milling machine requires tool changes and preventive maintenance after every lot of 500 parts. These changes require 30 minutes. 30 inc holdearly Suppose that scrap costs are negligible, and rework costs are $2, $3, and $4, respec- tively. Calculate the rework cost for producing the 1,000 units. What happens to the re- work cost if the scrap rates on processes 1 and 3 are reversed? Does this result agree with that of Problem 2.13? 2.15 Part X requires machining on a milling machine (operations A and B are required). Find the number of machines required to produce 3000 parts per week. Assume the B company will be operating five days per week, 18 hours per day. The following infor- mation is known: Operation B Standard Time 3 min 5 min Efficiency 95% 95% Reliability 95% 90% Defect Rate 2% 5% Note: The milling machine requires tool changes and preventive maintenance after every lot of 500 parts. These changes require 30 minutes. 30 inc holdearly