Identification of dispersion effects from unreplicated 2n−k fractional factorial designs
✍ Scribed by C.T Liao
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 88 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0167-9473
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✦ Synopsis
In this article, we present a test for dispersion e ects from the unreplicated 2 n-k regular fractional factorial designs. The proposed procedure for the identiÿcation of dispersion e ects uses the log-likelihood ratio based on normal errors. Some practical examples are given to illustrate the applicability of the test. It is shown that the proposed method is a useful and economical means for the identiÿcation of dispersion e ects at the screening stage of experiments. Comparing the power of our method with the two methods published in the literature, we suggest that our test might be more sensitive for identifying the dispersion e ects.