SURVEY OF SOFTWARE WITH MIXTURE EXPERIMENT CAPABILITIES 79 Mixture Ex eriment Analysis Features only a few more design points than the number of SET focus completel on experimental design.while mixturecom eing screene Hence This centroids of a constrained mixture the blank spaces in Table 2 for these packages. are applica nd a tions the responsefs)of interest (see Cornell (1990.section ity to transform the response variable(s)before mod- eling or other data analyses.Some software packages while othe s well as the mixture components (sce Cornell (1990 tions (usually via a built-in programming language). omponent designs The Compon mixture of two r more components (see Cornell mixture components to L-or U-pseudocomponents (1990,Pp.205-220) In some package this ca in programming language The Optimal Mixture Experiment Designs group indicates the capabilities of each software The Regression Model Forms group indicates or g cring sta that sa the types of re on mode ify.for experiments invoving mixture components nonmixture variable 465) optimal desie and software are model-driven,and require the user listed.See Cornell ()for to specify a model form Hence,there pp,24-27) 290296.and m(i.e.lists/menus of models users may pic log contrast models (pp.325-332 The next two om)while others allow for us in the group indicate whet in which the total amount of the mixture quire specifying a model form.Rathe .space-filling erperiments)or the levels of process designs try to fill he experimenta (1990. 407-41d.Not that models for a mixture experiment with one pro son,Moore,and Ylvisaker (1990)).The final item ir cess variabl an be used mixture-amoun e group indicates th side ating an optimal experimental design. zero value (Piepel (1988)). The last two items in he group indicate e whether provides fo ities for blocking experimental designs (see Cornell (1990.pp.436-451) Vol.29.No.1,January 1997 Journal of Quality Technology Reproduced with permission of the copyright owner.Further reproduction prohibited without permission. Reproduced with permission of the copyright owner. Further reproduction prohibited without permission