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#### Brian Hunt

This is something that I last needed to do about 20 years ago but can't remember how to do now. It's part of a case study. Details as follows:

Process A mean is 3 hours, standard deviation is 0.25 hours

Process B mean is 4 hours, standard deviation is 0.25 hours

Process C mean is 5 hours, standard deviation is 0.01 hours

Process D mean is 14 hours, standard deviation is 2.00 hours

How do I calculate the overall process capability and deviation?

Process A mean is 3 hours, standard deviation is 0.25 hours

Process B mean is 4 hours, standard deviation is 0.25 hours

Process C mean is 5 hours, standard deviation is 0.01 hours

Process D mean is 14 hours, standard deviation is 2.00 hours

How do I calculate the overall process capability and deviation?

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