Design specifications require that a key dimension on a product measure 100 ± 10 units. A process being considered for producing this product has a standard deviation of four units.a. What can you say (quantitatively) regarding the process capability?b. Suppose the process average shifts to 92. Calculate the new process capability.c. What can you say about the process after the shift? Approximately what percentage of the items produced will be defective?

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Statistical Process Control

The use of statistical methods to observe and manage a process to make sure that it operates at its full potential and thus produce a confirming product is called Statistical Process Control.