Looking for an example of a Simple DOE
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miranax.
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February 28, 2005 at 3:21 pm #38571
miranaxParticipant@miranaxInclude @miranax in your post and this person will
be notified via email.Hello all. I am in the process of preparing an introductory DOE course at the company I work for, and I need a simple 2^3 DOE example. The idea is to have the students actually do the experiment (in this case it will be full factorial), so that they learn the basics of how, who, when, where and why. Does anybody know links that will direct me to find such academic examples? It will be greatly appreciated.
0February 28, 2005 at 4:25 pm #115497I remember a good DOE on the composition of silly putty. It may have been from one of the statistics software firms. Perhaps someone with a better memory can help.
0February 28, 2005 at 4:44 pm #115499Miranax,
What you asking for is gold dust. As soon as someone posts a good experiment everyone will copy it and claim it as their own! Here are some ‘throw aways’ for you to try:
A kid’s experiment published on the net called craters involves dropping balls of different sizes into a variety of materials, such as flour, sugar or pearl barley, etc. The goal is to produce the largest craters!
I don’t know if this will give an interaction, but you can try it yourself and find out!
Other ideas I’ve considered include mutual inductance, Chladni’s figures, and Lego racing cars. (For the latter I glue several pieces together and hide blobs of solder in one combintion and ask teams to ‘fault find’ why one car goes further when rolled down a ramp than the other.
Sorry I can’t be more helpful … good luck!
Andy0February 28, 2005 at 4:53 pm #115500Use a catapult
Very angle settings, stop pin on the radial, and another static pin location. 3 factor two level or three levels depending on the the stop pin setting0February 28, 2005 at 5:15 pm #115502There is the “Paper Helicopter” example that is pretty good. You vary paper type, body length, and wing length. The goal is to come up with the best design that can stay aloft the longest.
Good luck, EdG0February 28, 2005 at 5:42 pm #115504
miranaxParticipant@miranaxInclude @miranax in your post and this person will
be notified via email.got that one…
the other one I have is the one where you have to maximize the number of bends of a paper clip (heat treated, non-heat treated, Size 1 and Jumbo). Problem is that finding the “right” clips is hard.
The catapult example is an excellent one, although I don’t foresee a bunch of engineers hurling things across the administrative area of the building…
thanks for the postings so far!0February 28, 2005 at 5:48 pm #115506catapult is one one of the best expample for this to be more interactive.
very famous in teaching these kind of examples and are available in many of the books
-pady0February 28, 2005 at 6:38 pm #115511Heating water in a microwave and measuring evaporation is what I used for my DOE. Different bowls, different liquids, covered, or uncovered. We also found a difference in heating for specified time, measuring, and then heating again as opposed to heating all at once.
0March 1, 2005 at 10:33 am #115527Try this link
http://curiouscat.com/bill/101doe.cfm
Regards0March 1, 2005 at 12:45 pm #115530Miranax,
Probably half of our BB classes are engineers and the catapults are always a hit ;-)
Best Regards,
Bob J0March 1, 2005 at 5:43 pm #115558
miranaxParticipant@miranaxInclude @miranax in your post and this person will
be notified via email.Thanks to all responses so far. After checking out several web-pages, I think I found what I was looking for.
Experiment: Time it takes to dissolve an Alka Seltzer
Factors: Water (hot, cold), Alka Seltzer (whole, cut in half), cola (non, 1 tablespoon).
A simple 2^3 full factorial can be designed this way. The idea came out from Launsby’s page.
Once again, thanks!0 -
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