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In fact, most people will come to this step to do Normal Capability Analysis without checking the statistical assumptions ( stability and Normality ) Most will use Microsoft Excel worksheet to calculate Cp & Cpk but seldom will calculate Pp … Continue reading
There are many methods to test whether a sample data is Normally distributed or not. In Minitab statistical software, there are basically 3 Normality test methods namely AndersonDarling, RyanJoiner and KolmogorovSmirnov. There are pros and cons of using the relevant … Continue reading
Reference capability analysis road map shown in previous blog, one need to ensure the process is stable and the data is Normally distributed prior to conducting Normal capability analysis ( calculation of Cp, Cpk, Pp and Ppk ). Note : … Continue reading
Most Six Sigma / Improvement practitioners will not feel strange to the use and application of capability analysis. A lot of capability analysis studies have been done to evaluate how capable of a process / product quality. Typically on Measure … Continue reading
Q8 : How do you interpret % Cont, % Study Var and % Tolerance and what’re the implications? R8 : %Cont and %Study Var are equivalent and both are different from %Tolerance if from the point view of interpretation and … Continue reading