Question

Question 1 5 pts Leah's Toys makes rubber balls. The current process is capable of producing balls that weigh, on average, 7.8 ounces. The tolerance limits for the process are +/- 0.5 ounces from the average weight. In order for Leah's process to achieve Six Sigma quality levels with regard to the weight of the balls, the standard deviation must not exceed ounces (state the answer at the precision level of 2-decimal places). Next

Answer 1

Solution:-

Upper Specification limit, USL=7.8+0.5=8.3

Lower Specification limit, LSL = 7.8-0.5= 7.3

If the process is centered. Actual Mean, M = 7.8

To give Cpk of 1.33

Cpk= (mean-L spec)/3sd

Sd= 0.5/3 -1.33 = -1.163

Hence, the standard deviation should be lower than 1.16

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