A question of importance in factor screening is when a two-level orthogonal design for a multifactor experiment can be projected into lower dimension, typically P = 2 or 3. New results relate to the ...

Let H with size h be a proper subset of S with s elements. A k × N array based on S is called an incomplete orthogonal array of strength t and index λ based on S and H if the columns of any t × N ...