🚀 go-pugleaf

> Frank Isackson
> re:SOLUTIONS
> FIsackson@aol.com
writes:

> I would be very grateful to be invited to the internment of
> PreControl Charts. The recent article in JQT should have put the
> last nail in the coffin of this bit of pseudostatistical chicanery.
> =======================


Although I am not a big fan of the "rainbow" charts myself, I am a
bit confused when good ol' Doc. Juran turns over section 24 in his
4th edition of Quality Control Handbook to the Shainins.  They in
turn devote some six pages plugging PRE-control charts out of about
29 pages discussing control charts in general.

Not having ready access to JQT,  I am curious as to your reasons for
homing in on the article you cited, and responding as you did.  It
appears that the rainbow charts are alive and well and used far more
frequently than perhaps they should be  (sometimes I think ANY use at
all is more than is warranted) but I am curious as to your reasons.







<< All opinions, statements, &c are my own>>
L.H. Garlinghouse, C.Q.E.
Pocahontas AR U.S.A.
(870) 892-4586  ext 7659
garlinghou@waterlooindustries.com