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Table 3.10
Factor levels in mixture designs
Factors
Experiment
A
B
C
1
1
0
0
2
0
1
0
3
0
0
1
4
0.5
0.5
0
5
0.5
0
0.5
6
0
0.5
0.5
7
0.333
0.333
0.333
8
0.670
0.165
0.165
9
0.165
0.670
0.165
10
0.165
0.165
0.670
￿
￿
￿
Figure 3.2
Experimental points for the mixture design
Generally, mixture designs are of K - 1 dimensionality, where K is the
number of factors (mixture components). The mixture regions of two-,
three-, and four-component mixtures are line, triangle, and tetrahedron,
respectively.
Previously described mixture designs are regular, since there are no
bounds on the proportion of mixture components (other than the total
 
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