Looking For Some Help :-)

[UGMENTALCASE]

Hi,

I'm hoping someone can help? I'm studying ASME and geometric tolerancing and the book I have mentions a study done by a ELECTRONICS MEASURING DEVICES INC, done in 1989 to verify surface forms. 

The paragraph reads; 
According to a study done by Electronic Measuring Devices Inc, in 1988, it requires an average of 191 points per square inch to achieve a 90% certainty in the collected data reaults when inspecting a simple flatness control. An average of 102 points per square inch were needed to achieve a 85% certainty of the actual value of flatness.

I'm trying to find said study!! Googling has brought up very little information, any help would be great!

Cheers

 

[pylfrm]

UGMENTALCASE,

http://www.emdsceptre.com/appnotes/mathmodl.htm]This[/url] may be a condensed version of what you're looking for, or at least somewhat related.

Google turns up another lead:

https://www.callabmag.com/article-index/[/URL]]Click here for a PDF list of articles 1995-2010. These have been archived and are available upon request.

If you find any more information about this, I'd be interested to hear.

pylfrm

 

[UGMENTALCASE]

Cheers I'll have a proper look at this later. I found a Google book where it talked about the samples used, but I got the feeling it brushed over it. I'd like to be seeing the full reports really, could be interesting reading!