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Question 186 / 323
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qualitycontrol-186
SIX SIGMA — The text gives specific sigma performance levels. What SIGMA METRIC VALUE is considered 'BEST' performance and what is considered 'WORST' performance?
A. Best = 6.0 sigma; worst = 1.0 sigma
B. BEST = 4.80 SIGMA (0.0477% error rate, 477 DPM); WORST = 2.20 SIGMA (24.4% error, 244,000 DPM); sigma from 6.0 to 3.0 = 'best case to worst case'
C. Best = 3.0 sigma; worst = 2.0 sigma
D. Best = 5.0 sigma; worst = 2.5 sigma
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