Suppose That a Firm Has Historically Been Achieving "Three-Sigma" Quality

Multiple Choice

Suppose that a firm has historically been achieving "three-sigma" quality. If the firm later changes its quality management practices such that it begins to achieve "six-sigma" quality, which of the following phenomena will result?

A) The average number of defects will be cut in half.
B) The specification limits will be moved twice as far from the mean.
C) The average number of defects will be cut by 99.9997%.
D) The average number of defects will be cut by 99.87%.
E) The average number of defects will be cut by 99.73%.