Re: SPC Theory question

["Dr A D Burns" <mmedia@ozemail.com.au>]

Jim Clauson wrote:

> The folks are beginner/intermediate control charters using variable
> data, but attribute data is a new area -- so there is learning curve for
> attribute thinking as well as understanding the decision criteria above.
>
> My request:
>
> If you have had success explaining Attribute Chart selection theory
> using the above to 'newbies' -- can you share your approach?


The simplest, as well as the most foolproof  approach for beginners is to
use XmR charts instead of p, np, c or u. This takes away the need for
decisions other than making sure the count exceeds 1. See Wheeler "Advanced
topics in SPC" page 266.

Dr Tony Burns
MicroMultimedia
mmedia@ozemail.com.au
www.q-skills.com