Suppose that a quality characteristic is
Chapter 15, Problem 44E(choose chapter or problem)
Problem 44E
Suppose that a quality characteristic is normally distributed with specifications at 150 ± 20. Natural tolerance limits for the process are 150 ± 18.
(a) Calculate the process standard deviation.
(b) Calculate PCR and PCRk of the process. Calculate the percentage of the specification width used by the process.
(c) What fallout level (fraction defective) is produced?
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