Screening designs are useful for situations where a large number of factors (q) is examined but only few (k) of these are expected to be important. It is of practical interest for a given k to know all the inequivalent projections of the design into the k dimensions. In this paper we give all the inequivalent projections of inequivalent Hadamard matrices of order 28 into k=3 and 4 dimensions and furthermore, we give partial results for k=5. Then, we sort these projections according to their generalized resolution and their generalized aberration.
Evangelaras, H. and Koukouvinos, Christos
"Screening Properties And Design Selection Of Certain Two-Level Designs,"
Journal of Modern Applied Statistical Methods: Vol. 2
, Article 9.
Available at: http://digitalcommons.wayne.edu/jmasm/vol2/iss1/9