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If this newsletter prompts you to ask your own questions about DOE, please address them via e-mail to: [email protected].
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PS. Quote for the month: Insightful observations on intelligence (Page down to the end of this e-zine to enjoy the actual quote.) |
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1: Software Alert: Version 8.0.6 of Design-Expert software released (free update for licensed users of v8) Newly-released version 8.0.6 of Design-Expert software is posted at this download site for free trial evaluation. This web site also provides free patches to update older licensed versions of 8.0.
It features an article by Consultant Brooks Henderson that explains how you can “Fly Your Way to Better DOE” via in-class experimentation. He reports on results from the latest paper-helicopter fly-offs at South Dakota School of Mines & Technology—his alma mater. Thank you for reading our newsletter. If you get the hard copy, but find it just as convenient to read what we post to the Internet, consider contacting us to be taken off our mailing list, thus conserving resources. (Note: You will be notified via the DOE FAQ Alert on new newsletter posts.) In any case, we appreciate you passing along hard copies and/or the link to the posting of the Stat-Teaser to your colleagues.
Original Question: From a Technology Improvement Head: Answer: From Stat-Ease Consultant Brooks Henderson:
In the two-factor interaction (2FI) plot I showed during the webinar, the two different slopes are shown on the same graph (see below). This is the plot of the AB interaction. Here, the black line indicates what happens to my response as we go from the low level to the high level of factor A while factor B is held at the low level (B- = 0.00 seconds). The red line is what the factor A graph looks like when B is held at the high level (B+ = 360.00 seconds). Again, the interaction just indicates that the graph for factor A will change depending on what level B is set to. The same is true for the factor B graph. It will depend on what level of A you are looking at.
So, to summarize, just be sure to look at the interaction graph when there is a significant interaction involving a factor. Do not look at the graph for just that factor, because it does not show the whole story. You need to look at the interaction graph.” (Learn more about interactions by attending the two-day computer-intensive workshop “Experiment Design Made Easy.” Click on the title for a complete description. Link from this page to the course outline and schedule. Then, if you like, enroll online.)
Original Question: From an Industrial Statistician: Nothing looks significant on the half-normal plot
Answer: From Stat-Ease Consultant Wayne Adams:
The half-normal plot is the best method we’ve found for selecting the correct effects for the model.” PS. Check out an illustrated detailing of “Over-Selection of Effects on the Half-Normal Plot” by Stat-Ease Consultant Shari Kraber on page 3 of the September 2009 issue of the Stat-Teaser posted here.
Response Surface Methods (RSM) can lead you to the peak of process performance. In this intermediate-level webinar presented on Thursday, September 8th, 2011 at 2 pm CDT*, Stat-Ease Consultant Shari Kraber will introduce the fundamental concepts of response surface methods (RSM). *(To determine the time in your zone of the world, try using this link. We are based in Minneapolis, which appears on the city list that you must manipulate to calculate the time correctly. Evidently, correlating the clock on international communications is even more complicated than statistics! Good luck!).
Stat-Ease Consultant Pat Whitcomb will detail “Design Space via DOE Using Intervals to Manage Uncertainty” at the European Network for Business and Industrial Statistics (ENBIS) annual gathering in Coimbra, Portugal on September 4-8. Get details on the conference here. On September 13 at IEEE’s Holm Conference on Electrical Contacts in Minneapolis I will present the Morton Antler Lecture on “Modern Design of Experiments (DOE)—75 Years of Advancements in Multifactor Test Methods”. For more information click here. PS. 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 reimbursement for travel expenses. In any case, it never hurts to ask Stat-Ease for a speaker on this topic. Seats are filling fast for the following DOE classes. If possible, enroll at least 4 weeks prior to the date so your place can be assured. However, do not hesitate to ask whether seats remain on classes that are fast approaching! Also, take advantage of a $395 discount when you take two complementary workshops that are offered on consecutive days. All classes listed below will be held at the Stat-Ease training center in Minneapolis unless otherwise noted.
* Take both EDME and RSM in June to earn $395 off the combined tuition!
** Attend both SDOE and DELS to save $295 in overall cost.
*** Take both MIX and MIX2 to earn $395 off the combined tuition! |
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Please do not send me requests to subscribe or unsubscribe—follow the instructions at the very end of this message. I hope you learned something from this issue. Address your general questions and comments to me at: [email protected]. Sincerely, Mark Mark J. Anderson, PE, CQE
For breaking news from Stat-Ease go to this Twitter site. DOE FAQ Alert ©2011 Stat-Ease, Inc. |
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