So, for the examples previously illustrated for n =4 alternatives, there are 64 (26) possible forms of the M2 preference matrix, there are only four Type I (M∗ 1) consensus matrices, and there are 32 (23 ·4) possible Type II (M∗ 2) consensus matrices. From the degree of preference measures given in Equations (9.12) and (9.13), we can construct a distance to consensus metric, defined as