Table 7. Primary Index Judgment Matrix.

A B1 B2 B3 B4 B5
B1 1 1/2 2 3 3
B2 2 1 4 5 4
B3 1/2 1/4 1 2 1/2
B4 1/3 1/5 1/2 1 1
B5 1/3 1/4 2 1 1