Fun news and timely information! If you are having trouble viewing this email view it online. | ||||||||||||||||||
|
||||||||||||||||||
|
|
|||||||||||||||||
|
||||||||||||||||||
P.S. Quote for the month: How not to ‘urn’ your keep when teaching statistics. (Page down to the end of this e-zine to enjoy the actual quote.) 1: Newsletter alert: The new issue of the Stat-Teaser features articles on the reasons why mixture design works so well for formulators and useful advice on how to augment an experiment that just misses the sweet spot. Check out the latest issue of our Stat-Teaser newsletter via this link. It features the following articles:
This issue also provides informative pieces on:
2: Software alert: Version 10.0.7 of Design-Expert software is released (a free update for licensed users of v10) Newly-released version 10.0.7 of Design-Expert software is posted at this download site for free trial evaluation. Individual licensees can update by simply following the path from within the program,* or by downloading the full release via the link above and reinstalling it. The release primarily provides maintenance of existing features. View the Read Me file at the download site for details on this update, installation tips, known ‘bugs,’ change history, and FAQs. For installation help, e-mail [email protected]. *Enabled via Edit on the main menu by selecting Preferences and, within the default General tab, turning on the “Check for updates on program start” option. This feature is not available in network versions.
Via three world-wide webinars during the second week of October (see times below), I will introduce tools for multi-component product development and optimization. I will brief formulators on tailored tools that hone in on optimal recipes. The webinar begins with a compelling case on the mismatch of factorial design and response surface methods to mixture DOE. Then, via real-world examples, I will lay out more appropriate designs and models for mixtures that ultimately lead to the “sweet spot”—a formulation meeting all product specifications.
Register now for the date and time that works best for you via this GotoWebinar link. After registering, you will receive a confirmation email containing information about joining the webinar.
Original question from a Senior Product Development Engineer:“I set up a half-fraction, 16-run, two-level factorial characterization experiment. Unfortunately, two of the runs got botched by setting the wrong level for one of the factors, causing an imbalance—6 low versus 10 high. Consequently, as warned by your software, the design became non-orthogonal. Nevertheless, the program, being so robust to mistakes like this, analyzed the results. How much of a problem is this?” Answer: As you no-doubt noticed, the off-kilter matrix causes effect selection via the half-normal plot to get a bit ‘slippery’. However, based on the VIFs (variance inflation factors) being well less than 10 on the two-factor interaction (2FI) model (seen under Evaluation) and what I found working through the analysis, I see no cause for great alarm. Correlation matrices of regression coefficients for design as-planned (left) versus being botched (right) (Learn more about design evaluation by attending the three-day computer-intensive workshop on Modern DOE for Process Optimization. Click on the title for a description of this class and link from this page to the course outline and schedule. Then, if you like, enroll online.)
(Second Notice) Stat-Ease software will be on exhibit at the Fall Technical Conference (FTC) in Philadelphia, PA, October 4 through 6, 2017. This annual forum for statistics and quality is co-sponsored by the Chemical and Process Industries Division (CPID) and the Statistics Division of the American Society for Quality (ASQ), and Sections on Physical and Engineering Sciences (SPES) and Quality and Productivity (Q&P) of the American Statistical Association (ASA). Two talks will be presented by our Consultants:
Sign up for the Philly FTC here. Click here for these and other upcoming appearances by Stat-Ease professionals. P.S. 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.
You can do no better for quickly advancing your DOE skills than attending a Stat-Ease workshop. In these computer-intensive classes, our expert instructors provide you with a lively and extremely informative series of lectures interspersed by valuable hands-on exercises with one-on-one coaching. Enroll at least 6 weeks prior to the date so your place can be assured—plus get a 10% “early-bird” discount.
See this web page for complete schedule and site information on all Stat-Ease workshops open to the public. To enroll, scroll down to the workshop of your choice and click on it, or call our Client Specialist Rachel Pollack, at 612-746-2030. 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.*
Please do not send me requests to subscribe or unsubscribe—follow the instructions at the end of this message. Sincerely, Mark Mark J. Anderson, PE, CQE P.S. Quote for the month: How not to ‘urn’ your keep when teaching statistics.
Trademarks: Stat-Ease, Design-Ease, Design-Expert and Statistics Made Easy are registered trademarks of Stat-Ease, Inc. Acknowledgements to contributors: For breaking news from Stat-Ease go to our Twitter feed. DOE FAQ Alert ©2017 Stat-Ease, Inc. |
||||||||||||||||||