A. four types of infrastructure (pipeline, excavation/pavement restore,creation of new streets, construction of new water storagetank) costs;
B. operating and maintenance costs;
C. two water system benefits (improvements in total network reliability,increase of efficiency in water supply along the new links created to supply the new zone).
D. three social costs associated with construction impacts (impacts over the road users, impacts over residents, interference with other existing infrastructures as gas, electricity, cable TV networks);
The 10 criteria considered are enumerated with more detail in Table 1.