The complexity of modern society relies on many systems to
function including power generation, natural gas, telecommunications
and transportation networks. These networks are examples
of critical infrastructure (Rinaldi et al., 2001). The importance of
these networks makes it necessary to plan for potential disruptions
caused by partial or complete network outages (Brown et al., 2005;
O'Reilly et al., 2006). An index is often applied to quantify the results
from a network evaluation, where a value is calculated for
each asset in the system. The index can be calculated with a single
criterion or with multiple criteria. For example, Sullivan et al.
(2010) determined the rank-order for increased travel time when
each road link was individually removed from a transportation
network. Stakeholders can use the index values to plan for future
capital replacement costs or potential outages and to identify areas