Stat-Ease Blog

  • “BetterSpeak”—3 Steps to Improving How You Say What You Say

    By Guest Author Dr. David Pelton

    Stat-Ease is collaborating with Dr. Pelton to help users who achieve experimental success better communicate their results.  Enjoy this article on improving how you say what you say!

    In Act 1, Scene 1 of Shakespeare’s tragedy King Lear, Lear asks his three daughters to proclaim their affection for him which the first two, Goneril and Regan, do with genuine warmth, but the third, Continue reading

  • How To Save Costly Project Engineering Time With This Innovative Application of Response Surface Models (RSM)

    By Guest Author Nate Kaemingk

    Lead engineers are incredibly overworked and their time is disproportionately valuable compared to some more junior engineers. But when it comes to doing project cost estimations, we don't have much of a choice but to ask some of these high-value engineers for the estimates if we want a realistic level of accuracy. Plus, the unfortunate reality is that many project costs end up being too high to justify the screening business case Continue reading

  • Five Keys to Increase ROI for DOE On-Site Training

    By Shari Kraber

    A recent discussion with a client led to these questions—“How do we keep design of experiments (DOE) training “alive” so that long-term benefits can be seen? How do we ensure our employees will apply their new-found skills to positively impact the business?” In my 20+ years as a DOE consultant and trainer, I have seen many companies who invested in on-site training, only to have it die a quick death mere days Continue reading

  • Adding Intervals to Optimization Graphs

    Design-Expert® software provides powerful features to add confidence, prediction, or tolerance intervals to its graphical optimization plots. All users can benefit by seeing how this provides a more conservative ‘sweet spot’. However, this innovative enhancement is of particular value for those in the pharmaceutical industry who hope to satisfy the US FDA’s QbD (quality by design) requirements.

    Here are the definitions: Continue reading

  • Choosing the Best Design for Process Optimization

    Ever wonder what the difference is between the various response surface method (RSM) optimization design options? To help you choose the best design for your experiment, I’ve put together a list of things you should know about each of the three primary response surface designs—Central Composite, Box-Behnken, and Optimal.

    Central Composite Design (CCD)

  • Tips and Tricks for Navigating Design-Expert® Software

    We’ve designed Design-Expert® software to be flexible and user-friendly. For those of you who haven’t had a chance to fully explore its capabilities, here are some tips to help you navigate the software and find options that are useful for you:

    • The all-new Design Wizard asks you a series of questions, and then directs you to a starting design! You may want to modify things from here, but it’s a great starting Continue reading
  • The Importance of Center Points in Central Composite Designs

    A central composite design (CCD) is a type of response surface design that will give you very good predictions in the middle of the design space.  Many people ask how many center points (CPs) they need to put into a CCD. The number of CPs chosen (typically 5 or 6) influences how the design functions.

    Two things need to be considered when choosing the number of CPs in a central composite design:
    Continue reading

  • Don’t Let R^2 Fool You

    By Pat Whitcomb

    Has a low R2 ever disappointed you during the analysis of your experimental results? Is this really the kiss of death? Is all lost? Let’s examine R2 as it relates to factorial design of experiments (DOE) and find out.

    R2 measures are calculated on the basis of the change in the response (Δy) relative to the total variation of the response (Δy + σ) Continue reading

  • State Fair Bread — through SCIENCE!

    Hello, Design-Expert® software users, Stat-Ease clients and statistics fans! I’m Rachel, the Client Specialist here at Stat-Ease. If you’ve ever called our general line, I’m probably the one who picked up; I’m the one who prints and binds your workshop materials when you take our courses. I am not, by any stretch of the imagination, a statistician. So why am I, a basic office administrator who hasn’t taken a math class since high school, writing a blog post for Stat-Ease? Continue reading

  • The 6th European DOE User Meeting Recap

    Stat-Ease, Inc. and CQ Consultancy hosted the 6th European DOE User Meeting in Leuven, Belgium on May 18th-20th, 2016. We offered two design of experiments (DOE) workshops on the 18th, and then the two-day DOE User Meeting on the 19th-20th. The venue at the historic Faculty Club was charming--complete with cobblestone streets, flowers in full bloom, and delicious artistically-arranged cuisine. The technical program was also excellent. Continue reading

Items 1 to 10 of 30 total

per page
  1. 1
  2. 2
  3. 3