Some new three-level orthogonal main effects plans robust to model uncertaintyTsai, P. W., Gilmour, S. G. and Mead, R. (2004) Some new three-level orthogonal main effects plans robust to model uncertainty. Statistica Sinica, 14 (4). pp. 1075-1084. ISSN 1017-0405 Full text not archived in this repository. It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing. Abstract/SummaryIn this paper, we list some new orthogonal main effects plans for three-level designs for 4, 5 and 6 factors in IS runs and compare them with designs obtained from the existing L-18 orthogonal array. We show that these new designs have better projection properties and can provide better parameter estimates for a range of possible models. Additionally, we study designs in other smaller run-sizes when there are insufficient resources to perform an 18-run experiment. Plans for three-level designs for 4, 5 and 6 factors in 13 to 17 runs axe given. We show that the best designs here are efficient and deserve strong consideration in many practical situations.
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