QM$4330,$ Chapter $10$ Assignment $($Objective Questions $18,$

$28,$ and $29)$

Objective Question $18$

A metal fabricator produces connecting rods with an outer diameter that has a $1+-\mathrm{.}01$

inch specification. A machine operator takes several sample measurements over time

and determines the sample mean outer diameter to be $1\mathrm{.}002$ inches with a standard

deviation of $0\mathrm{.}003$ inch.

a$.$ Calculate the process capability index for this example.

b$.$ What does this figure tell you about the process?