In a food processing plant, four design parameters, A, B, C, and D, each at three levels, have been identified as having an effect on the moisture content in packaged meat. Three noise factors, E, F, and G, each at two levels, are also to be investigated in the experiment. In the inner array, an L9 orthogonal array is used with the factors A, B, C, and D assigned to columns 1, 2, 3, and 4, respectively.

For the outer array, an L4 orthogonal array is used with the noise factors E, F, and G assigned to columns 1, 2, and 3, respectively. Table