January 2002

Vol. 4, No. 1

Here's this month's issue of Quality eLine, a newsletter from PQ Systems, Inc. that provides industry news, case studies, quality tips, and information about software products and training services.

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In this issue you will find:

Pre-control analysis: Stirring the pot of controversy
Statisticians disagree about the integrity of pre-control analysis. At best, it should be accompanied by a clear understanding of its limitations. At worst, it may lead to errors in judgment and analysis of charts. For a discussion of pre-control and out-of-control analysis, go to

Quality Quiz: Another quiz from Professor Cleary--and last month's winners!
Winners of last month's quiz (and a copy of Quality Gamebox) are Michael Bailey (American Society for Quality); Greg Bays (Gibbs Die Casting); Robert Boss (Raymond Corp.); Janice Burke (Keller Crescent Co.); and Dianne Busse (Metalcraft). Congratulations! For January's quiz question, and a chance to win a copy of this fun, interactive teaching tool, go to Quality_Quiz.htm.

Data in everyday life: Shovelling off to Buffalo Chart shows snow is out of control
While most of the country usually longs for a white December, Buffalo, NY has consistently come through with snow in that holiday month. This year, the snowfall was out of control--in many ways. The entire December amount fell in the final week of the month, putting plowing efforts at a unique disadvantage. This chart shows what out of control means in statistical terms for Buffalo. Go to

Six Sigma and more: David Schwinn simplifies Six Sigma for small organizations
With a focus on big-ticket cost savings in large companies, smaller organizations are sometimes daunted by the prospect of launching a Six Sigma program. David assuages these concerns with a simplified approach to introducing Six Sigma. Go to

Copyright 2002 by PQ Systems, Inc. All rights reserved.