Hi all,

While using the EWMA chart,
for representing dots and calcutaing limits is it meaningless to use a Lambda coefficient different from a sample to the other? :bonk:

I mean with the formula which allows the representation of dots [Di = Lambda * X_bar_i + (1 - Lambda) * Di-1] has to use the same Lambda for each considered sample. Isn't it?

Thanks for your comments.:thanx:

Star18.