C-Spec, Inc., is attempting to determine whether an existing machine is capable of milling an engine part that has a key specification of 2 + 0.07 inches. After a trial run on this machine, C-Spec has determined that the machine has a sample mean of 2.001 inches with a standard deviation of 0.030 inch. Calculate the Cpk for this machine. (Round your answer to 3 decimal places.) Cpk

Essentials Of Investments
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ISBN:9781260013924
Author:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
Publisher:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
Chapter1: Investments: Background And Issues
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C-Spec, Inc., is attempting to determine whether an existing machine is
capable of milling an engine part that has a key specification of 2 +
0.07 inches. After a trial run on this machine, C-Spec has determined
that the machine has a sample mean of 2.001 inches with a standard
deviation of 0.030 inch.
Calculate the Cpk for this machine. (Round your answer to 3 decimal
places.)
Cpk
Transcribed Image Text:C-Spec, Inc., is attempting to determine whether an existing machine is capable of milling an engine part that has a key specification of 2 + 0.07 inches. After a trial run on this machine, C-Spec has determined that the machine has a sample mean of 2.001 inches with a standard deviation of 0.030 inch. Calculate the Cpk for this machine. (Round your answer to 3 decimal places.) Cpk
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Step 1

Solution:-

Cpk stands for Process capability index, which measures capability of a process.

Formula to calculate Cpk:

Cpk = minimum of {[(U – mean) / 3σ] , [(mean – L) / 2σ ]}

where,

U stands for upper specification limit

L stands for lower specification limit

σ stands for standard deviation

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