Год выпуска: 2010 Автор: Ashraf Almimi Издательство: LAP Lambert Academic Publishing Страниц: 148 ISBN: 9783838372198
Описание
Split-plot designs are effective in industry due to time and/or cost constraints, restriction on randomization of the treatment combinations of the hard-to-change factors and different sizes of experimental units. Some of the results of fractional factorial split-plot experiments can be ambiguous and a need may arise to conduct follow-up experiments to separate effects of potential interest.The first objective of this research is to extend the foldover technique to break the alias chains of split-plot experiments.Six rules are provided to develop foldovers for minimum aberration resolution III and resolution IV FFSP designs.The second objective is to extend a method due to Draper and Stoneman to estimate missing observations from unreplicated two-level factorial and FFSP designs. The missing observations, which can either be from the same whole-plot, from different WPs, or comprise entire WPs, are estimated by equating to zero a number of specific contrast columns equal to the number...
