Shanqi, Pang; Sanyang, Liu; Yingshan, Zhang - In: Statistics & Probability Letters 59 (2002) 1, pp. 17-22
An orthogonal array (OA) is said to be a satisfactory orthogonal array if it is impossible to obtain another OA from it by adding one or more columns. By exploring the relationship between OAs and orthogonal decompositions of projection matrices, we present a method of checking a satisfactory OA.
