Re: Special Causes Indicators in Red Bead

[WyoCheek@aol.com]

Ok this helps but I think these still do not answer my question about 
"unknown causes"--sort of like Deming saying "there are known and unknownable 
waste? Can unknowable waste be an unknowable cause? 

Just wondering how one refer to something as common if they do not know what 
they are? I suppose one can but my mind wants to rejects this view?  

SCheek DDS 

> Rich DeRoeck
> 
> >>I have an audio where Deming says, 
> "Sometimes there will be defects where the cause will never be known". Can
> we 
> call it special or common then? Do you think maybe there needs to be a new 
> operational definition--"unknown cause" when using the control chart in the 
> 
> RB experiment?<<