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.
For an assortment of appetizers to get this Alert off to a good start, see these new blogs at http://statsmadeeasy.net (beginning with the most recent on down):
1. FAQ: Why two-level factorial design trumps "OFAT"
*(See Figure 1 in "Trimming the FAT out of Experimental Methods" posted at http://www.statease.com/pubs/doeprimer.pdf)
PS. For first-hand testimonial on the value (50 million dollars!!!) of two-level factorial design versus OFAT, see item #3 at http://www.statease.com/news/faqalert3-2.html. It tells the story of how Chevron's senior statistician Jake Sredni proposed a two-level fractional factorial design that subsequently saved the
(Learn more about two-level factorial design by attending the three-day computer-intensive workshop "Experiment Design Made Easy." See http://www.statease.com/clas_edme.html for a description of this class and then link from this page to the course outline and schedule. Then, if you like, enroll online.)
2. Software Review: Scientific Computing World declares version 7.1 of Design Expert® software "a very worthwhile upgrade"
In a recent review for Scientific Computing World, writer Felix Grant finds that Design Expert 7.1 "builds on the many improvements from earlier upgrades." See his evaluation at http://tinyurl.com/39zb66 (shortened from original link to page posted at http://www.scientific-computing.com). Felix concludes by declaring v7.1 "a very worthwhile upgrade." If you own v7.0 or an older version, contact Stat-Ease Customer
3. Reader Response: Accolades for 2nd Edition of DOE Simplified
I am always pleased to get positive feedback like this from a university Professor of Chemical and Biochemical Engineering: "I congratulate you both on co-authoring such an amazing book, DOE Simplified.* Truly, you have simplified complex concepts and presented them in the most logical manner. I thoroughly enjoyed reading through the sections of your book. You have left out all the unnecessary math and conveyed the principles in the most effective way." The DOE, and subsequently RSM, Simplified books* were intended as primers for experimenters with little or no statistics background. They have served this purpose — no doubt. However, I did not anticipate the number of engineering schools who appreciate our practical approach to these statistical tools.
*(The two-part series of "Simplified" books on DOE and RSM can be ordered online from http://www.statease.com/prodbook.html.)
4. Info Alert: Publish your DOE success story!
Stat-Ease is searching for individuals or teams willing to share their success stories. Inspirational case-study articles are highly sought after in all industries. Anyone who has designed an experiment that has led to improvements in their products or processes is invited to contact us. Don't worry if it didn't go perfectly, as long as you learned something about the subject of interest. Perhaps you saved the company some money, or were able to make a product that met or surpassed customer requirements. We can team you up with a technical writer who will coordinate the creation of the magazine article. You provide the interesting
information and the technical writer provides the format. Plus, the technical writer does the work of submitting your case study to the appropriate magazines or journals. The article is published with your name as author.
(Jennifer was quoted by technical writer Richard Burnham in an inspiring and informative article "Engineers as Credible Marketers" published by The Business to Business Marketer — see http://www.statease.com/pubs/eng-marketers.pdf.)
5. Events Alert: Do you seek a speaker on DOE?
Do you need a speaker on DOE for a learning session within your company or technical society at regional, national, or even international levels? If so, contact me. It may not cost you anything if Stat-Ease has a consultant close by, or if a web conference will be suitable. However, for presentations involving travel, we appreciate reimbursements for airfare, hotel and meals — expenses only. In any case, it never hurts to ask Stat-Ease for a speaker on this topic. Contact Mark@StatEase.com if you have an event coming up with an open slot for a presentation.
(Click http://www.statease.com/events.html for a list of upcoming appearances by Stat-Ease professionals. We hope to see you sometime in the near future!)
6. Workshop alert: Experiment Design Made Easy in San Diego Seats are filling fast for the following DOE classes
Seats are filling fast for the following DOE classes:
—> Experiment Design Made Easy (EDME)
—> Mixture Design for Optimal Formulations (MIX)
—> Response Surface Methods for Process Optimization (RSM)
See http://www.statease.com/clas_pub.html for complete 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 Elicia at 612.746.2038. 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.*
*Once you achieve a critical mass of about 6 students, it becomes very economical to sponsor a private workshop, which is most convenient and effective for your staff. For a quote, e-mail firstname.lastname@example.org.
I hope you learned something from this issue. Address your general questions and comments to me at: Mark@StatEase.com.
Mark J. Anderson, PE, CQE
PS. Quotes for the month—Can statistics be glamorous:
Acknowledgements to contributors:
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