Issue: Volume 5, Number 7
Date: July 2005
From: Mark J. Anderson, Stat-Ease, Inc. (http://www.statease.com)

Dear Experimenter,

Here's another set of frequently asked questions (FAQs) about doing design of experiments (DOE), plus alerts to timely information and free software updates. If you missed the previous DOE FAQ Alert, please click on the links at the bottom of this page. If you have a question that needs answering, click the Search tab and enter the key words. This finds not only answers from previous Alerts, but also other documents posted to the Stat-Ease web site.

Feel free to forward this newsletter to your colleagues. They can subscribe by going to http://www.statease.com/doealertreg.html. If this newsletter prompts you to ask your own questions about DOE, please address them via mail to:StatHelp@StatEase.com.

Here's an appetizer to get this Alert off to a good start—an unearthly photograph of a sunset over the Gusev Crater on Mars: http://makeashorterlink.com/?Q1AE21A4B. It was captured by the rover Spirit under direction from NASA and the Jet Propulsion Laboratory (JPL) at Cal Tech. I received this fabulous photo automatically via the "Astronomy Picture of the Day" (APOD) screen saver at http://nightskylive.net/software/apod/, which links to the source: http://antwrp.gsfc.nasa.gov/apod/.

July 5th's APOD was a photograph taken by Deep Impact's mother ship of the previous day's crash into comet Tempel 1 by its martyrous offspring. For this picture and many others of this celestial fireworks display coinciding with our Independence Day holiday here in the United States of America, see http://deepimpact.jpl.nasa.gov/home/index.html.

The news media are trying to work up concern about debris from the comet harming people on Earth. Last week's premiere of Spielberg's latest movie "War of the Worlds" (WoW) may be making Americans jittery about objects from outer space. Sitting only four rows from my local theatre's "UltraScreen," I was blown away by this film (or was it the incredible bass vibrations from the massive theatrical sub-woofer?). For movie trailers, check out the awesome WoW web-site at http://www.waroftheworlds.com/.

Here's what I cover in the body text of this DOE FAQ Alert (topics that delve into statistical detail are designated "Expert"):

1. Newsletter alert: The July issue of the Stat-Teaser features strip-block design that saved millions of defective batteries
2. Help wanted: Stat-Ease seeks an enthusiastic DOE professional
3. Info alert: Case study on DOE to improve a semiconductor process; and a DOE primer for optical engineers
4. Book alert: There is a new edition of "Statistics for Experimenters" by Box, Hunter and Hunter
5. Events alert: Link to a schedule of appearances by Stat-Ease
6. Workshop alert: See when and where to learn about DOE


PS. Quote for the month:
Why statistics makes it hard for anyone to tell time.

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1. Newsletter alert: The July issue of the Stat-Teaser features strip-block design that saved millions of defective batteries

Many of you will soon receive a printed copy of the latest Stat-Teaser, but others, by choice or because you reside outside of North America, will get your only view of the July issue at http://www.statease.com/news/news0507.pdf.

The feature article, "Strip Block Design Gives Battery Experiment a Charge," shows how, with the use of Design-Expert® software, I reproduced an innovative quality improvement study masterminded by a pair of Brazilian statisticians.

The other article announces a new, one-day "crash course" on DOE for sales and marketing. It will be presented at the Stat-Ease training center in Minneapolis by Dr. Paul Selden on September 29. See http://www.statease.com/clas_smdoe.html for information on this class, background on the instructor, a syllabus and links to sign up online.

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2. Help wanted: Stat-Ease seeks an enthusiastic DOE professional

We at Stat-Ease, Inc, a Minneapolis-based statistical software company, offer an opportunity for an energetic person to join our team. The full-time job opening encompasses a combination of teaching and technical development.

Job responsibilities include:
— teaching workshops
— providing statistical support
— defining software test cases
— researching statistical methods
— writing technical materials
— other statistically-related duties based on experience.
Expect to be traveling out of our Minneapolis headquarters about 30% of the time.

Minimum qualifications for this DOE professional are:
— Master’s degree in statistics
— hands-on DOE experience
— excellent verbal and written communication skills
— strong ability for applied mathematics.

We desire experience in:
— teaching statistics to non-statisticians
— manufacturing or other industrial functions (two years of work experience—internships acceptable)
— mixture design for optimal formulation
— computer programming (C++ desirable)
— developing online course materials.

E-mail resumes to Shari Kraber at Shari@Statease.com by August 10th to be considered for this position as a DOE professional.

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3. Info alert: Case study on DOE to improve a semiconductor process; and a DOE primer for optical engineers

"Semiconductor Manufacturing" magazine's May issue features Carlton Washburn's article, "Reducing 300mm Wafer Coating Defects without Compromising Uniformity." For the original manuscript, see http://www.statease.com/pubs/washburndoe.pdf.

The June/July issue of OE Magazine (optical engineering) includes a column by me titled "Trimming the Fat." My submission is posted at http://www.statease.com/pubs/doeprimer.pdf. It provides a brief introduction to design of experiments in contrast with the traditional one-factor-at-a-time (OFAT) approach. I hope you find this useful as a quick primer for those who have never heard of DOE.

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4. Events alert: Link to schedule of appearances by Stat-Ease

Click on http://www.statease.com/events.html for a list of appearances by Stat-Ease professionals. We hope to see you sometime in the near future!

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5. Workshop alert: See when and where to learn about DOE

See http://www.statease.com/clas_pub.html for schedule and site information on all Stat-Ease workshops open to the public. To enroll, click the "register online" link on our web site or call Stat-Ease at 1.612.378.9449. If spots remain available, bring along several colleagues and take advantage of quantity discounts in tuition, or consider bringing in an expert from Stat-Ease to teach a private class at your site. Call us to get a quote.

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I hope you learned something from this issue. Address your general questions and comments to me at: Mark@StatEase.com.

Sincerely,

Mark

Mark J. Anderson, PE, CQE
Principal, Stat-Ease, Inc. (http://www.statease.com)
2021 East Hennepin Avenue, Suite 480
Minneapolis, Minnesota 55413 USA

PS. Quote for the month: Why statistics makes it hard for anyone to tell time:

"A person with one watch knows the time. The owner of two can never be certain."
—Unknown

Trademarks: Design-Ease, Design-Expert and Stat-Ease are registered trademarks of Stat-Ease, Inc.

Acknowledgements to contributors:
— Students of Stat-Ease training and users of Stat-Ease software
— Fellow Stat-Ease consultants Pat Whitcomb and Shari Kraber (see http://www.statease.com/consult.html for resumes)
— Statistical advisor to Stat-Ease: Dr. Gary Oehlert (http://www.statease.com/garyoehl.html)
— Stat-Ease programmers, especially Tryg Helseth (http://www.statease.com/pgmstaff.html)
— Heidi Hansel, Stat-Ease marketing director, and all the remaining staff

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Interested in previous FAQ DOE Alert e-mail newsletters?
To view a past issue, choose it below.

#1 Mar 01
, #2 Apr 01, #3 May 01, #4 Jun 01, #5 Jul 01 , #6 Aug 01, #7 Sep 01, #8 Oct 01, #9 Nov 01, #10 Dec 01, #2-1 Jan 02, #2-2 Feb 02, #2-3 Mar 02, #2-4 Apr 02, #2-5 May 02, #2-6 Jun 02, #2-7 Jul 02, #2-8 Aug 02, #2-9 Sep 02, #2-10 Oct 02, #2-11 Nov 02, #2-12 Dec 02, #3-1 Jan 03, #3-2 Feb 03, #3-3 Mar 03, #3-4 Apr 03, #3-5 May 03, #3-6 Jun 03, #3-7 Jul 03, #3-8 Aug 03, #3-9 Sep 03 #3-10 Oct 03, #3-11 Nov 03, #3-12 Dec 03, #4-1 Jan 04, #4-2 Feb 04, #4-3 Mar 04, #4-4 Apr 04, #4-5 May 04, #4-6 Jun 04, #4-7 Jul 04, #4-8 Aug 04, #4-9 Sep 04, #4-10 Oct 04, #4-11 Nov 04, #4-12 Dec 04, #5-1 Jan 05, #5-2 Feb 05, #5-3 Mar 05, #5-4 Apr 05, #5-5 May 05, #5-6 June 05, #5-7 July 05 (see above)

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