Question

A metal fabricator produces metal rods with an outer diameter that has a 3.250 ±.01 inches...

  1. A metal fabricator produces metal rods with an outer diameter that has a 3.250 ±.01 inches specification. A machine operator takes several sample measurements over time and determines the sample mean outer diameter to be 3.251 inches with a standard deviation of .002 inches.
    1. Calculate the process capability index for this example.
    2. Determine the probability of producing a defect.
    3. Calculate the DPMO of the process.
    4. Is the process six sigma compliant?

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