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Just brainstorming… I’ve coached a few military oriented Lean Six Sigma projects and always had to chuckle regarding the value saved. Projects that redesign the system so armored tanks wouldn’t go missing… saved $200MM, etc. Perhaps your art could utilize pictures of large pieces of equipment that’s been found in some way… not sure. Good…[Read more]
Kim Niles wrote a new post, Six Sigma Via Context 8 years, 11 months ago
I’m sure all of us experience daily memos, emails, voice mail, procedures, forms, and reports that are nearly meaningless due to lack of context. Some ramble on with obvious passion but fail to explain what the […]
Kim Niles wrote a new post, What Makes Six Sigma Work? 9 years ago
Some consultants are earning seven figure salaries, CEOs of large companies are claiming billions of dollars saved, conferences, books, and seminars are popping up everywhere, and yet one can argue that there […]
Kim Niles wrote a new post, Most Practical DOE Explained (with Template) 11 years ago
For purposes of learning, using, or teaching design of experiments (DOE), one can argue that an eight run array is the most practical and universally applicable array that can be chosen. There are several forms of […]
Kim Niles wrote a new post, Importance of Test Plans/Test Protocol (with a Template) 11 years ago
Test plans, also called test protocol, are formal documents that typically outline requirements, activities, resources, documentation and schedules to be completed. Some form of test plan should be developed prior […]
Kim Niles replied to the topic Difference between Correlation and Regression in the forum General 13 years, 1 month ago
Kiran:
Good question, I had a statistics teacher answer this question once by telling me that correlation analysis is always through visual interpretation and regression analysis is always mathematical. I’ve stuck with that definition even though I’m not very comfortable with it. I hope to read more posts on this string.
KN – http:…[Read more]Kim Niles replied to the topic Analyzing Variance in a DOE in the forum General 15 years, 5 months ago
Nats:
I just want to be clear that “replicates” are defined as repeat experiments whereas “repeat measures” are defined as multiple samples per run. Perhaps you’re just getting caught up in definitions.
In this case, you need to measure variation in the “repeat measures” in order to compare variation in the factors.
KNKim Niles replied to the topic Analyzing Variance in a DOE in the forum General 15 years, 5 months ago
Nats:
ANOVA is in essence a signal to noise measurement used to provide confidence (variation based) in factor effect (factor means) measurements. It doesnt compare variation relative to the factors to that end. I believe it was Taguchi who outlined using run related signal to noise measurements and or standard deviation / variation as you st…[Read more]Kim Niles replied to the topic injection molding DOE: minitab 14 in the forum General 16 years, 2 months ago
Thomas:
Three thoughts, one is to make sure you explain what will become the assumptions you use in your final report so you can later go back if you want and analyze the effects of temperature changes. For example:
– One hour is assumed to be sufficient for temperature change stabilization.
– The split plot approach was c…[Read more]Kim Niles replied to the topic How to reduce subjectivity in Six Sigma in the forum General 16 years, 4 months ago
Neel:
Regarding subjectivity, one of the main reasons why Six Sigma works is that it attracts top management. Top management tends to react to concrete financial figures. Therefore, it can be argued that Six Sigma should remain somewhat subjective as its success lies in part to its ability to expose subjective costs that always do exist in…[Read more]Kim Niles replied to the topic Breakthrough from DOE in the forum General 16 years, 5 months ago
Thanks Bill and Robert:
Interesting conversation. One quick thought I have related to problem solving is that benefits are usually obvious so the trick becomes developing a test strategy / test plan that justifies the effort. Also, remember that the benefits are not always known in advance such as when new discoveries are made or factors su…[Read more]Kim Niles replied to the topic New Product DOE in the forum General 16 years, 6 months ago
Dear JAG:
One more thing to suggest that I dont see mentioned in other posts is to prioritize your 10 factors and fix in place as many as seems reasonable to the team before you start your DOEs. This is assuming your goal is to produce evidence of a stable process for selling that product.
I like to adopt a RPN prioritizing system…[Read more]Kim Niles replied to the topic What factor affects my results? A case for DOE? in the forum General 16 years, 8 months ago
Dear Tim: Youve got some great ideas here and Id follow them first. However, after youve performed multiple regression analysis and other forms of plotting to highlight what controls your situation, you might want to try to generate a mixture DOE from passive data. It might be tricky to find representative data but if you are able to do tha…[Read more]
Kim Niles replied to the topic DOE on rare events in the forum General 16 years, 8 months ago
Dear J.K:
I like Michaels idea of performing a DOE on the whole process but would suggest you test within acceptable tolerances on production with every run being one entire day’s worth of production. Your response will simply be the quantity of special rejects for that day.
Since you don’t have a clue as to what causes the spe…[Read more]Kim Niles replied to the topic Geometric Mean in the forum General 16 years, 9 months ago
Harry:
You might want to read this site at http://www.math.toronto.edu/mathnet/questionCorner/geomean.html where you will see how the geometric mean answers the question, “if all the quantities had the same value, what would that value have to be in order to achieve the same product?”. Since the arithmetic mean answers the question “if all th…[Read more]Kim Niles replied to the topic A question to Reigel Stewart in the forum General 16 years, 9 months ago
Dear John, et al.:
This is a very interesting conversation to me as not much is written on the 5 sigma wall and or obtaining very high sigma levels.
Since any process sigma can also be considered to depend upon how close the outer edges of the process distribution (what is) comes to the specs (what should be), achieving high levels of si…[Read more]Kim Niles replied to the topic using doe in actual customer application in the forum General 16 years, 11 months ago
Gordo:
Heres a couple points of advice:
1. Make sure you watch what happens as possible. Ive performed similar experiments thinking those taking the data are well trained only to find out they mixed the samples in the bags.
2. Throw in one variable that you already have a good feel for as possible. That way if the results for t…[Read more]Kim Niles replied to the topic DOE strategy in the forum General 16 years, 11 months ago
Dear Andy:
Since no one has commented I’ll give you my thoughts. Take them with a grain of salt :)
Regarding your first sentence, as I understand your question, DOE’s measure these issues as error and or how well the data fit the model depending upon the type of problem. When the R^2 value is low then your data did not fit the model…[Read more]Kim Niles replied to the topic Identical words in the forum General 17 years ago
Vincent:
Context based questions always peak my interest … .
My answer to your question is yes when the context surrounding the sentence supports it and no when it doesn’t. The word Factor for example could be referring to a control factor or a response factor … big difference.
Does that make sense?
KN – http://KimNiles.comKim Niles replied to the topic To Sigma or Not To Sigma in the forum General 17 years, 2 months ago
Dear MLT:
Improving anything costs money or other resources and therefore should take place in accordance with need. There is a spectrum of different types of effort that might be required from individual task levels to full time sequestered team based efforts. Six Sigma projects are somewhere in between.
Each level of effort has an app…[Read more]- Load More