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Biometrika 2000 87(3):695-699; doi:10.1093/biomet/87.3.695
© 2000 by Biometrika Trust
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Miscellanea. Updating the average efficiency factor in {alpha}-designs

ER Williams and JA JohnZ

CSIRO Forestry and Forest Products, PO Box E4008, Kingston, ACT 2604, Australia E-mail: emlyn.williams@ffp.csiro.au Z Department of Statistics, University of Waikato, Private Bag 3105, Hamilton, New Zealand E-mail: nye@stats.waikato.ac.nz

This paper presents a method for updating the average efficiency factor of an {alpha}-design after an exchange or interchange in the {alpha}-array. This allows the average efficiency factor to be used directly as the objective function in an {alpha}-design computer search algorithm.

Key Words: {alpha}-design; average efficiency factor; design generation algorithm; exchange procedure; interchange procedure; latinised design; resolvable design


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