A Manufacturer Embarking on a Six Sigma Program Sets the Goal

Multiple Choice

A manufacturer embarking on a Six Sigma program sets the goal of having True Six Sigma capability for all processes by the end of the month. If their current process capability index on a key metric is less than 2.0 and the process capability ratio is 1.25, what must happen with the process standard deviation?

A) The process standard deviation must be reduced by about 25%.
B) The process standard deviation must be reduced by about 37%.
C) The process standard deviation must be reduced by about 50%.
D) The process standard deviation must be reduced by about 67%.