We find that there are multiple Pareto optimal points giving at least two possible distinct rankings:
1 > 3 > 4 > 2 and 1 > 3 > 2 > 4. Notice that first ranking scheme is the same as the one obtained
from the classical method used in Example 1.1. The second ranking scheme is also reasonable, since if
we analyse the local rankings associated with the set of SR-matrices in detail, we see that 2 > 4 for
A1, A2 and A5. In particular, 2 is preferred to all other alternatives for A2.