Skill A2. Consider the performance of the following machine…
Skill A2. Consider the performance of the following machine:The natural job process time has a mean equal to 4 minutes per part with a natural standard deviation of 20 seconds. The mean time to failure is 500 minutes, the mean repair time is 4 minutes, and the repair time variance is 4 minutes2. A non-preemptive calibration step is done after every 20 parts; the mean calibration time is 5 minutes, and its standard deviation equals 1.5 minutes. What is the mean of the effective process time (in minutes)?
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