I'm doing Six Sigma or Lean

Design of experiments (DOE) is a very important element in Six Sigma or Lean methodology. Stat-Ease offers a structured statistical approach to help you understand the factors that affect a process and then create meaningful and effective tests to verify possible improvement ideas or theories. We focus on making DOE as easy as possible with relevant articles, top-notch training, consulting services, books, newsletters, FAQs and DOE Resources, and user-friendly software.

Contact us with questions, suggestions, or other useful links and resources. Call 612.378.9449 or e-mail us.

Best Practices

Stat-Ease offers a several articles on DOE and Six Sigma. If you would like to learn more about this subject, we recommend you begin with the articles below.

1. The Six Sigma Method and Design of Experiments—This article by Peter Peterka (www.6sigma.us) explains what Six Sigma is and DOE's role in it.

2. Cost-Effective and Information-Efficient Robust Design for Optimizing Processes and Accomplishing Six Sigma Objectives—Standard factorial designs (one array) offer a cost-effective and information-efficient robust design alternative to parameter designs (two -array) made popular by Taguchi. This paper compares these two methods (one-array versus two-array) in depth via an industrial case study. It then discusses advanced tools for robust design that involve application of response surface methods (RSM) and measurement of propagation of error (POE).

Also see this postscript to the article. (ps_re_Taguchi.pdf—120KB)

3. Six Sigma for the Road—Read this Stat-Teaser newsletter article from Mark Anderson on using propagation of error (POE) and multiple response optimization to analyze a DOE on driving time.

Click here to go the Articles page and see all available DOE articles and case studies.



The quickest and easiest way to learn design of experiments is to attend a 2-day workshop. The class most suited to beginners is "Experiment Design Made Easy." This computer-intensive workshop covers the practical aspects of DOE. You will learn all about simple, but powerful two-level factorial designs.

Stat-Ease offers workshops for beginning through advanced experimenters. For a schedule of upcoming classes and prices, click here. We offer both public and private on-site training. To register for a public workshop, go to our Workshop Registration page. For more information on training, visit our web site, e-mail the Workshop Coordinator, or call 612.746.2038.

For those of you who don't have the time or money to attend a live workshop, we offer a variety of online classes through the Stat-Ease Academy. The Stat-Ease Academy offers e-learning content on a variety of topics. Learn basic statistics and the fundamentals of DOE at your convenience. No traveling necessary! All courses are now available free of charge. Click here to learn more and sign up for a workshop today here.

We offer multiple student, multiple class, and academic discounts. Contact the Workshop Coordinator for details.

Consulting Services

Patrick Whitcomb Mark Anderson Shari Kraber Martin Bezener

Consultants from left to right are: Top Row—Pat Whitcomb, Mark Anderson, Shari Kraber, and Martin Bezener

Do you need statistical support, or have a project that requires design of experiments (DOE) but don't know where to begin? Whether you want to solve a specific quality problem, create the perfect product, improve your process, find a cheaper but equally good solution, or validate your process and procedures, Stat-Ease can help. For fast help, Stat-Ease offers e-mail/phone and on-site consulting services. Most problems are solved for less than $2750. If you don't have the time or resources to learn DOE yourself, contact us for quick and cost-effective help solving your problem.

Step 1—Call 612.378.9449 or e-mail stathelp@statease.com to discuss the problem so that we can determine whether or not DOE can help you.

Step 2—Issue a purchase order, typically for up to $2750, for consulting services. There are no upfront charges.

Step 3—Start the consulting process. We bill only for time used, when it is used.

E-mail us your problem and contact information to get started. Or, call us now at 612.378.9449.

Click here for more information.


Visit the Stat-Ease bookstore for recommended books on DOE. To get you off to a good start we suggest:

Formulation Simplified Book

1. "DOE Simplified: Practical Tools for Effective Experimentation, 3rd Edition," by Anderson & Whitcomb—This updated introductory text covers all of the basic essentials and is filled with interesting anecdotes and sidebars that make it fun to read.

Bring the DOE Simplified, 3rd Edition book to life with it's companion e-learning experience, the DOE Simplified Launchpad. This completely narrated presentation of the first three chapters of the book includes hands-on exercises and is designed to bring you up to speed on the basics of the two-level factorial design.  For more information, click here.

2. RSM Simplified: Optimizing Processes Using Response Surface Methods for Design of Experiments, 2nd Edition, by Anderson & Whitcomb—This book is the next step in your DOE education. Its simple and fun approach is for those who desire knowledge on response surface methods, but dislike the academic nature of other books on the topic.

3. Formulation Simplified: Finding the Sweet Spot through Design and Analysis of Experiments with Mixtures, by Anderson, Whitcomb, & Bezener—Formulation Simplified deviates significantly from all other statistical texts on design of experiments (DOE) for mixtures by making these powerful methods easy to study and fun to read. The authors provide a rich array of insightful case studies that illustrate the essentials of mixture DOE. Real-world examples are offered as problems at the end of many chapters for those who are serious about trying these new tools on their own. 

Newsletters, FAQs and DOE Resources

Use the search bar above for answers to your specific questions. You will find a wealth of information in Mark Anderson's bi-monthly e-mail newsletter, the DOE FAQ Alert. Sign up to receive the latest FAQ's, alerts to timely articles, free software updates, and interesting tidbits.

Check out our printed newsletter, the Stat-Teaser. In it you will find fun experiments, DOE articles, software and workshop news, and much more. To sign up for the printed edition, e-mail info@statease.com with your full name and address. Be sure and note that you are signing up for the Stat-Teaser. (North America only—all others should sign up for the "DOE FAQ Alert" to be notified when the latest Stat-Teaser is available for download.)

Stat-Ease offers a large collection of case studies and articles on DOE. Look for applications in your industry.

Affiliated Blended Lean Six Sigma Training Program

Fisher College of Business at The Ohio State University
Fisher College of Business at The Ohio State University and MoreSteam.com have teamed up to bring you a premier Six Sigma training program designed as the most time-sensitive, value-driven program in existence today. Most training programs require a series of four (or more) one-week sessions spanning over several months. Our learning approach blends a world-class online program and one full week of in-class experience.

Other Six Sigma Resources

Complete suite of Lean Six-Sigma eLearning courses.

Six Sigma Training.com
Training and certification in Six Sigma.

Software, training, and consulting for Design for Six Sigma and Quality by Design.

Six Sigma IQ
Six Sigma and Process Excellence IQ is a division of IQPC. The web site offers access to a wealth of relevant content for Process Excellence, Lean, and Six Sigma practitioners.