Simon Fraser University7 年
Example 42.2: Estimating the Process Standard Deviation
The following data set (WIRE) contains breaking strength measurements recorded in pounds per inch for 25 samples from a metal wire manufacturing process. The subgroup sample sizes vary between 3 and 7 ...
isixsigma on MSN14 天
While Calculating Pp and Ppk, How Do I Determine the Value of Short-Term and Long-Term ...
Key Points Short-term standard deviation is best used for Cp and Cpk. When calculating Pp and Ppk, the long-term standard ...