Floyd Electric is fabricating flanges for a new electrical motor
The flange is to be 25 millimeters in diameter with an upper tolerance limit of 26.5 millimeters and a lower tolerance limit of 23.5 millimeters. Bill Floyd took a sample consisting of ten flanges, measured the diameter and recorded the observations in the table.
25.69 25.58 24.78 24.94 24.87 24.63 25.70 25.52 24.95 24.91
What is Floyd Electric's process capability?
What will be an ideal response?
Answer:
=
=
=
= 25.16
=
= 0.42
The process is not centered so the process capability index is calculated as
CPK = Min
CPK = Min
CPK = 1.07
Their process capability is poor.
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