Question: 4 . A manufacturing company has a machine with a natural process time of 4 minutes and a standard deviation of 4 0 seconds. The

4. A manufacturing company has a machine with a natural process time of 4 minutes and a standard deviation of 40 seconds. The mean time to failure is 2 hours and the mean time to repair is 10 minutes. Assume \( c_{r}=c_{s}=1\).
a. What is the availability, effective process time, and coefficient of variability for this machine? How would you characterize its variability?
b. If the machine requires a 30 minutes setup between batches of 400 parts. What is the coefficient of variability considering production stoppages for part changeovers?
4. A manufacturing company has a machine with a natural process

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