Posts: 4119
From:West Chester, OH, USA
Registered:

posted 08 August 1998 06:46 AM               

---

An FYI thread:

--> From: Guy Rodgers Subject: RE: EVOP -
--> Any experience/Mullins/Rodgers
-->
--> Mullins wrote; "Does anyone have any information on a course
--> called "Evolutionary Operation of Processes (EVOP)" which is
--> referenced in QS-9000, section II.2- Continuous Improvement?"
-->
--> The requirement for EVOP knowledge in Section 2.3 Techniques
--> for Continuous Improvement has been removed from the 3rd
--> edition Quality System Requirements of QS-9000. The section
--> has been moved to Element 4.2 Quality System under paragraph
--> 4.2.5.3.
-->
--> Other techniques eliminated from the requirement include;
--> Capability Indices (Cp,Cpk), Cost of Quality, and Problem
--> Solving. Finally, a note for interpretation was added to
--> clarify that the list only shows examples and other methods,
--> which meet the suppliers needs, may be used.
-->
--> To further explain, EVOP is not a course, but rather a
--> process or technique of systematic experimentation.
--> Evolutionary Operations (EVOP) is based on the understanding
--> that every production lot has the ability to contribute
--> valuable information on the effect of process variables on a
--> particular product characteristic or feature.
-->
--> Typical methods used involve structured designs of
--> experiments (DOE) which may result in interrupting production
--> flow to conduct the trials or experiments. EVOP, on the other
--> hand, is intended to introduce small changes in the process
--> variables during normal production flow. These changes are
--> not large enough to result in non-conforming product, but are
--> significant enough to determine the optimum process ranges.
-->
--> Best regards,
-->
--> Guy Rodgers, QA Administrator Paulo Products Company E-mail:
--> [email protected] Phone: (314) 647-7500 Fax: (314)
--> 647-7094

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Posts: 4119
From:West Chester, OH, USA
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posted 08 August 1998 07:06 AM               

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From: [email protected]
Subject: RE: EVOP - Any experience/Mullins/Brauer

Sheila Mullins asks --
Does anyone have any information on a course called
"Evolutionary Operation of Processes (EVOP)" which is
referenced in QS-9000, section II.2- Continuous Improvement?

Reply -------------------------
While I cannot recommend a "course", you will find
information on EVOP in statistics books on experimental
designs. Look for one that has Response Surface Methodology
in it. Here's a brief description of EVOP from one such
book --

EVOP consists of systematically introducing small changes
in the levels of operating variables, usually 2^k factorial
designs, such that serious disturbances in yield, quality
or quantity will not occur, yet large enough that potential
improvements will eventually be discovered.
-- Design and Analysis of Experiments, 3rd Edition
-- by D.C. Montgomery, 1991, John Wiley & Sons, Inc.
-- ISBN 0-471-52000-4

Also, you should note that in QS 3rd Edition, Continuous
Improvement is now 4.2.5 and EVOP was deleted from the
examples list. However, I believe it would still be
acceptable to use EVOP since it is a type of DOE (Design
of Experiments) which remains on the examples list.

Hope this helps.
Les B.

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posted 08 August 1998 07:32 AM               

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From: David Thibault
Subject: Re: EVOP - Any experience/Mullins/Thibault

One point not mentioned so far: Since the changes for EVOP are small relative to those for DOE, EVOP must rely on many replications to separate the signal from the noise.

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posted 08 August 1998 07:50 AM               

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From: Suzanne Fiorino
Subject: RE: EVOP - Any experience/Mullins/Bigelow/Fiorino

One can think of EVOP as 'baby steps" experimentation. Typically a small full factorial design is used to set up the EVOP test and the intent is to get meaningful information while still producing saleable product. QualPro in Knoxville, TN, has an excellent experimental design course, very practical, and a section of it covers EVOP. Also George Box, who is at the University of Wisconsin, may have a course on EVOP.

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posted 13 June 1999 04:44 AM               

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Date: Sun, 23 May 1999 12:00:56 -0400
From: [email protected]
Subject: Electronic reprint of textbook about quality improvement using simplex EVOP

The textbook "Sequential Simplex Optimization: A technique for Improving Quality and Productivity in Research, Development, and Manufacturing" by F. H. Walters et al has been out of print for some time. CRC Press LLC has now licensed us t he right to make electronic reprints of this excellent text. We wish to continu e the work to popularize the simplex EVOP methodology, and make it an everyday tool for many more professionals and researchers. We have therefore decided to publish and distribute the electronic reprint through our web site. You may fre ely browse the whole text as HTML or download it as an Adobe Acrobat PDF-file f rom http://www.multisimplex.com

Best regards,
Tomas Oberg
MultiSimplex AB
[email protected]

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