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 see (quantitatively) regarding the process capability?
b) Suppose the process average shifts to 92. Calculate the new process capacity.
c) What can you say about the process after the shift? Approximately what percentage of the items produced will be defective?