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 monthassuming the company will be operating 5 days a week, 9 hours per day under the machine performancein 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%

i). Draw the process diagram for this problem
ii). Total milling machines type A
iii). Total milling machines type B

b). Compute the number of machines required if the company is considering two 9 hours shifts (instead ofjust one).
i). Total machines type A
ii). Total machines type B

c). Discuss what will happen to the number of milling machines required if the machines require a 30minutes tool changes and maintenance after a every 500 parts.