Quality during Design Blog

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When it’s Not Normal: How to Choose from a Library of Distributions

When trying to fit a probability distribution to quantitative results, sometimes the normal probability doesn’t fit. Minitab has a wealth of distributions to pick from. Do you just pick whichever one Minitab tells you fits the best? Maybe not. Just because the distribution fits your data doesn’t mean it’s a good one to use. We…

What are TQM, QFD, Six Sigma, and Lean?

You may have heard of QMS but are not sure how your activities fit in. Or, you’ve heard of QFD, ISO 9000, Six Sigma, Lean…these cryptic names that you’re not sure what they’re about. You may be doing activities under one of your company’s procedures and asking, “Why am I spending time on this?”  Sometimes it’s good to re-orient to the big picture.…

A Systematic Approach to Innovation

When we’re trying to innovate, we can get trapped into the old thinking that the solution has to be out there somewhere. We need to think outside the box to find the solution to a problem. So, we gather up a team and start brainstorming. I mean, just think of the word, the image that word conjures up: a wild free for…

The Designer’s Important Influence on Monitoring After Launch

How to Handle Competing Failure Modes

If we’re not careful with or ignore failure modes, we can choose the wrong reliability model or statistical distribution. If our product performance is close to the required limits and/or we need a very accurate model, this could be a big problem. We talk about the importance of failure modes and step-through a tensile-test example…

About Using Slide Decks for Technical Design Reviews

A danger of using slide decks for technical design reviews is loss of important technical information. In order to summarize something in a slide or slide deck, the presenter thins-out information without its raw data and divorces it from the plots, graphs, and other technical analyses. Slide decks are useful to the presenter to pull…