In: Statistics and Probability
A process has a Cpk = 1.35 and is centered between the specification limits. (a) What is the DPM of the process? (b) If the mean of the process increases by 1.5σ the DPM would be?
Here we know it very well that :
Cpk < 1, process is referred to as incapable of producing the product within specifications, and
Cpk ≥ 1, process is referred to as capable of producing the product within specifications.
we know that Cpk = 1.33 for
and
The Process yield is the complement of process fallout and is approximately equal to the area under the PDF:
For 1.33 it is given , and that is approximately equal for 1.35 also
So, we have:
Process yield = 99.99%
1) DPM = 63
2) For change in mean to
Area under the probability density function .
Process yield = 99.38%
and DPM = 6209
We were unable to transcribe this image
We were unable to transcribe this image
We were unable to transcribe this image
We were unable to transcribe this image
We were unable to transcribe this image