A Manufacturer of Silk Inspects Each Bolt of Material at the End

question 128

Multiple Choice

A manufacturer of silk inspects each bolt of material at the end of the manufacturing process.When the process is in control,it averages 11 defects per bolt.If a 2-sigma control limit is used,what should be done if a bolt is found with 3 defects?

• A) Do nothing; the process is in control.
• B) Do nothing, even though the process is out of control.
• C) Management should investigate and exploit the common causes of variation present.
• D) Management should investigate and exploit the assignable causes of variation present.

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