## 3 Model and Application
### Application of the Model to a Case Study
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Intervention ID** & **Intervention Description** & **The Best Alternative Chosen (a\({}_{\text{MI}}\))** & **Critical Issues** \\ \hline \multirow{4}{*}{1} & \multirow{4}{*}{Rehabilitation of deteriorated water network} & Alternative 1: replacement of a part (about 4600 m) of the portion of the network considered most critical by the utility & B1.1—B1.4—B4.1 \\  & & Alternative 2: construction and & \\  & & modernization of 36 remote control & K3.1 \\  & & of remote-control services & stations on the plants with consequent & \\  & & implementation of the SCADA system & \\ \hline \multirow{4}{*}{3} & \multirow{4}{*}{Adaptation of distribution systems} & Alternative 2: Restoration of 22 plants & \\  & & both in terms of civil works and & \\  & & electromechanical equipment & \\ \hline \multirow{4}{*}{4} & \multirow{4}{*}{Creation of water districts} & Alternative 2: Creation of & \\  & & 23 water districts & K2.1 \\ \hline \multirow{4}{*}{5} & Rehabilitation of the deteriorated sewerage system & Alternative 2: Replacement of the & \\  & & sewerage system for a total of 5700 m & C2.1—C2.6 \\ \hline \multirow{4}{*}{6} & \multirow{4}{*}{Adjustment of manholes} & Alternative 2: Restoration and & \\  & & waterproofing of all 720 damaged wells & C2.7 \\ \hline \multirow{4}{*}{7} & \multirow{4}{*}{Adaptation of purification plants} & Alternative 2: Renovation of some & \\  & & structural parts and the fence, & \\  & & waterproofing the roof, the replacement & \\  & & of certain valves and adaptation of the & D2.2—D2.3—M3.1 \\  & & electrical system to the appropriate & \\  & & safety standards for 13 sewage & \\  & & treatment plants & \\ \hline \multirow{4}{*}{9} & \multirow{4}{*}{Adaption of management software} & Alternative 1: Adoption of an SAP & \\  & & management software & \\ \hline \multirow{4}{*}{10} & \multirow{4}{*}{Replacement of user meters} & Alternative 1: Replacement of 1200 old & \\  & & meters with drinking water meters & \\  & & equipped with remote reading module & \\ \hline \multirow{4}{*}{11} & \multirow{4}{*}{Adaptation of the collection system} & Alternative 1: Waterproofing the roof, & \\  & & the restoration of the fence, replacement & \\ \cline{1-1}  & & of certain valves and adaptation of the & \\ \cline{1-1}  & & electrical system to safety standards & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: The best alternatives chosen for each intervention. Table A1. The definition phase of these coefficients is quite delicate as it is influenced by the subjective perception of the decision maker regarding the urgency in mitigating a specific criticality. The suggestion given to the EGA and utility was to formulate judgments that may be useful not only with respect to their own sphere of competence but in terms of the benefits for the other stakeholders involved (the end users of the services, funding bodies, administrations municipal authorities, utility employees, etc.) and minimizing negative impacts on the environment and society. The results of Phase 3 of the protocol are reported in the next section.