Monthly Archives: February 2010

Misconception on GR&R

Recently, a concern raised whether one should do a MSA ( Measurement System Analysis ) upfront prior to proceeding to conduct a Capability Analysis of a new product design. People tended to link the term GR&R with MSA as the … Continue reading

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Capability Analysis ( Cp, Cpk, Pp & Ppk ) Part 7 ( Final part ) – How to perform Non-Normal Capability Analysis ?

In previous blog, 3-Parameter Weibull was determined as best fit Non-Normal distribution type. In addition, the parameter of chosen distribution can reference below ( extended from Minitab session window result from previous blog ). The value of Shape and Threshold … Continue reading

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Capability Analysis ( Cp, Cpk, Pp & Ppk ) Part 6 – How to confirm Non-Normal type distribution ?

In previous blog, it was mentioned there were 2 possible options if sample data is found to be Non- Normally distributed. Box Cox transformation is one of them and another one is to assess and confirm which Non- Normal distribution … Continue reading

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Capability Analysis ( Cp, Cpk, Pp, Ppk ) Part 5 – How to perform Box Cox transformation ?

There are 2 possible options if one found the sample data distribution is not Normally distributed. One of the option is to perform Box Cox transformation, with the hope that the new transformed data will follow Normal distribution. Another option … Continue reading

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