L
luisfrpereira
Hello.
I am a student finishing a degree in industrial engineering.
I would like to know the formulas to calculate the factors d2 an d3 used to build Xbar-R and X-mR charts.
Is there a book where this formulas are writen? I have tried a few they all have a table and no formulas...
I am a student finishing a degree in industrial engineering.
I would like to know the formulas to calculate the factors d2 an d3 used to build Xbar-R and X-mR charts.
Is there a book where this formulas are writen? I have tried a few they all have a table and no formulas...