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Class exercises other than statapult for DOE?

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  • #37870

    EMM
    Participant

    Hello All. I’m looking for some advice on class exercises that can be done by our participants to apply/prove their knowledge and run a DOE.  We already use the statapults and paper helicopters for other exercises so looking for different suggestions.
    We would prefer a pre-packaged six sigma kit or product, but could also put it together oursleves. Here are more details of what we are looking for.
    – teams of 4 participants will decide the factors, levels, etc. and plan the DOE so the exercise should use something that has a number of possible factors that will impact the output
    – we prefer a measurable output (as opposed to taste of various more fun edible experiments we thought of)
    – entire process of planning, running, analyzing, and optimizing for best results should take about 2-3 hours or so
    – must be feasible in office setting
    Suggestions are appreciated, as well as companies that may make products we could use for this exercise. Thanks

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    #112535

    Mike Carnell
    Participant

    EMM,We always carry aspirin in case the Statapults don’t clear customs. Use coated and uncoated, warm and cool warer, stired (not shaken) and unstirred. Response is time to disolve.You can also drop playing cards over targets that you can make from flip charts and measure the distance from the center (gives a continuous response variable).Good luck.

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    #112536

    NS
    Participant

    There is a paper by Bert Gunter in “The American Statistician” (November 1993, Volume 47, No. 4, pages 265-269) that may be of interest to you.  It describes a simple physical experiment that illustrates DOEs.

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    #112539

    EMM
    Participant

    Thanks Mike and NS.  The aspirin exercise sounds like a good one for our situation.
    NS, would you have a copy of that article or could you give me a few quick points from it? I contacted the ASA and it will take up to 10 business days to get the info but we need it prior to that. You can email me at [email protected] if so
    Thanks!

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    #112540

    Mike Carnell
    Participant

    EMM,You are welcome.One thought – define what a disolved aspirin is or you will have a measurement problem. Unstirred is the issue because it just falls apart and sits there.Good luck

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    #112541

    Savage
    Participant

    Launsby had us use Alka Seltzer.  They dissolved nicely.

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    #112543

    EMM
    Participant

    Thanks for the tip, Mike. Just thinking about how long it would take a coated asprin to dissolve in cold water…. can you give an estimated time frame on the experiment? Thanks again

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    #112553

    Tim F
    Member

    One system I did for a presentation was paper helicopters. I only had 1 hr so I pre-made the helicopters, but there are lots of variables you could try:
    * length of blade
    * width of blade
    * length of base
    * width of base
    * cardstock vs typing paper
    * white vs colored paper
    * clockwise vs counterclockwise rotation
    * adding a paper clip
    * folding the base to make it shorter
    * folding the base to make it narrower
    * having the launcher say “ready, set, go” or just dropping it.
    * others???I simply used time of flight, but you could also make some sort of judgement on the “quality” of the flight. All the materials are usually available in any office. Usually someone will have a digital watch with a stopwatch. (If you have several stopwatches, you could introduce some of the ideas of gage R&R, or add another factor for whose watch you use).Unusual observation: There was a significant interaction between type of paper and color of paper! This threw me so I found a sensative balance and weighed the paper. It turns out with the paper I had, white typing paper was ligher than blue, but blue cardstock was ligher than white. Weight is an important factor, but since white was heavier in one case and lighter in the other, it didn’t show up as a main effect. Tim F

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    #112566

    Mike Carnell
    Participant

    EMM,We don’t actually chill the water – just straight from the faucet. The time seems to vary with the manufacturer but it will be around 7 minutes. The nice part is you can common sense the answer and then provide data to substantiate it. When you get the data you can extrapolate the idea of testing an unsubstantiated belief. When you are working with teams that people will strongly believe something and you can wrap the data around it to either prove or disprove what they believe.Good luck

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    #112568

    Mike Carnell
    Participant

    Matt,That is a great idea. Bob is a smart guy and definately one of the better people you can get involved with when it comes to DOE. He has that intuitive feel for what is going on in the DOE and does a good job of demystifying it for people (there are a lot of DOE guru’s that take it the other way).Thanks.Regards

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    #112578

    OneOfTheHerd
    Participant

    … and as an added benefit you end up with a tonic to cure all the stats induced headaches you’ve created during the training session!  Educational and funcational.  What an excellent idea.

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    #149425

    Leonard Lye
    Participant

    Something more fun and something that most people can identify with is the DOE-Golfer. It is a golf playing DOE teaching toy. More info can be obtained from http://www.footworker.ca.  Or you can read about it from http://www.statease.com/golftoy.html. It sells for US $220.00 and is beautifully made of oak.
    Leonard
     

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