Engineering Board Exam Reviewer · Engineering Management · hard
A process with specification limits of 9.4 and 10.6 mm has a mean of 10.2 mm and a standard deviation of 0.15 mm. What is its Cpk?
- 1.33
- 1.78
- 0.89
- 0.44
Answer
C. 0.89
Solution
Cpk = min[(USL - )/3 , ( - LSL)/3σ] = min[0.4/0.45, 0.8/0.45] = 0.89.
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