RE: Shewhart's Maximum Control

[Alan C Clark <alan@keybiz.com>]

On 23 March 2000 14:29 Neal you wrote:
>
> When I am trying to model cycle time, I try to match the skewed
> distribution.  But if I am trying to identify special causes of
> variation, I
> go ahead and use the control chart (usually XmR) as it does it's 
job
> of
> identifying when special causes enter the system regardless of the
> distribution.
>
When you say 'model' do you mean using a histogram to look at the 
shape, centre and spread? Surely with real world data mathematical 
modelling would require assumptions?

Alan

Alan C Clark
Key Business Improvement
alan@keybiz.com
tel: ++44 (0)1527 61929
fax ++44 (0)1527 598014
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