A Metal-Cutting Operation Has a Target Value of 20 and Consistently

question 176

Multiple Choice

A metal-cutting operation has a target value of 20 and consistently averages 19.8 with a standard deviation of 0.5. The design engineers have established an upper specification limit of 22 and a lower specification limit of 18. What is the process capability index?

• A) 1.20
• B) 1.33
• C) 1.46
• D) 1.66

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Definitions:

Depression

A low point or area in the Earth's surface, which can be caused by various geological processes such as erosion or tectonic movements.

Valley

A low area between hills or mountains, typically with a river or stream flowing through it.

Ridge

A long, narrow elevated landform often formed by the uplift of the surrounding area or by tectonic activities.

Plucking

A glacial process where rocks and other materials are pulled away from the earth and incorporated into the moving glacier, mainly due to the freezing of water into cracks.