Course Solutions Uncategorized (Answered) : For a given item the upper specification limit is 65 and the lower specification limit is 43. It can be assumed that: 1) the pro

(Answered) : For a given item the upper specification limit is 65 and the lower specification limit is 43. It can be assumed that: 1) the pro

June 27, 2024June 27, 2024| adminadmin| 0 Comment| 7:45 pm
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For a given item the upper specification limit is 65 and the lower specification limit is 43. It can be assumed that: 1) the process mean is centered in the specification interval; and 2) the process standard deviation is 4.4. What is this process’ capability ratio?

Expert Answer

USL=65

LSL =43

Mean ,U=(65+43)/2=54

Std Dev = 4.4

Cpk=min (CpU,CpL)

CpU= (USL-Mean)/(3*std dev) = 11/(3*4.4)= 0.833

CpL= (Mean-LSL)/(3*Std Dev) = 0.833

Hence, Cpk= 0.833

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