Increasing performance in a Six Sigma project from 3 sigma to 4 sigma would reduce defects per million by a factor of:

OPTIONS

• 2
• 8
• 10
• 16

ANSWER

10

EXPLANATION

At 3 sigma level Defects per million opportunities are 66,807. Whereas at 4 sigma level it is at 6,210 defects per million. The factor reduction in defect is 10.758 which is rounded to 10.