This is with reference to Minitab 14 attribute analysis using p-chart. The results window shows a Summary Stats box. This gives a " PPM Def " and "Process Z ". This PPM number corresponds to a Process Z-value which is calculated by finding the Z-value with shift for the PPM and then adjusting this Z-value for the shift by subtracting 1.5. Table-S, Appendix-E from "Implementing Six Sigma" shows that a Z-value without the shift corresponds to a PPM of 1374 approx. What am I missing here ? How can we convert/adjust the Z-value without converting/adjusting the PPM for the shift ?
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Comments
kevinr 7/14/2004
As a start I would recommend searching the internet. If you are looking for texts, Quality Press at www.asq.org is a good bet, or if you are looking for how to write a (ISO 9001) manual you can do worse than purchase my book from Quality Press, ISO 9001:2000, A Practical Quality Manual Explained, which will give you the full text of an ISO compliant manual.