## 4 Empirical Analysis
### Comparison of Alternatives by City Size
\begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Category**} & \multirow{2}{*}{\begin{tabular}{c} **Sub-Category** \\ **(Service Sub-Element)** \\ \end{tabular} } & \multicolumn{2}{c}{\
\begin{tabular}{c} **Large Cities in the Seoul** \\ **Metropolitan Area (n = 26)** \\ \end{tabular} } & \multicolumn{2}{c}{
\begin{tabular}{c} **Small and Medium-Sized Cities** \\ **in Other Provines (n = 22)** \\ \end{tabular} } \\ \cline{3-6}  & \multicolumn{1}{c}{CC\({}_{1}\)} & \multicolumn{1}{c}{Rank} & \multicolumn{1}{c}{CC\({}_{1}\)} & \multicolumn{1}{c}{Rank} \\ \hline \multirow{4}{*}{AI and CCTV} & CCTV system for AI (e.g., high-resolution & \multirow{2}{*}{0.96} & \multirow{2}{*}{1} & \multirow{2}{*}{0.93} & \multirow{2}{*}{1} \\  & CCTV systems, Image function improvement & & & & \\ \cline{1-1} \cline{2-6}  & AI video analysis for living safety (e.g., & \multirow{2}{*}{0.73} & \multirow{2}{*}{4} & \multirow{2}{*}{0.88} & \multirow{2}{*}{2} \\  & detection for littering, drunk people/smoking & & & & \\ \cline{1-1} \cline{2-6}  & AI video analysis for crime prevention (e.g., & \multirow{2}{*}{0.79} & \multirow{2}{*}{3} & \multirow{2}{*}{0.84} & \multirow{2}{*}{3} \\  & automated tracking, assault detection) & & & \\ \hline \multirow{4}{*}{IoT and lighting} & IoT automatic situation recognition system & \multirow{2}{*}{0.55} & \multirow{2}{*}{7} & \multirow{2}{*}{0.62} & \multirow{2}{*}{8} \\  & (e.g., automatic recognition/warning) & & & & \\ \cline{1-1} \cline{2-6}  & Intelligent pedestrian environment system & \multirow{2}{*}{0.64} & \multirow{2}{*}{5} & \multirow{2}{*}{0.80} & \multirow{2}{*}{5} \\  & (e.g., walking guide lights for pedestrian & & & \\ \cline{1-1} \cline{2-6}  & Smart street lights (e.g., scream recognition, & \multirow{2}{*}{0.45} & \multirow{2}{*}{9} & \multirow{2}{*}{0.68} & \multirow{2}{*}{7} \\  & emergency bells, voice warnings) & & & & \\ \hline \multirow{4}{*}{Platform} & Crime monitoring system (e.g., crime maps, & \multirow{2}{*}{0.82} & \multirow{2}{*}{2} & \multirow{2}{*}{0.83} & \multirow{2}{*}{4} \\  & CCTV analysis, automatic link to 112) & & & & \\ \cline{1-1} \cline{2-6}  & Mobile crime prevention app (e.g., real-time & \multirow{2}{*}{0.61} & \multirow{2}{*}{6} & \multirow{2}{*}{0.62} & \multirow{2}{*}{9} \\  & indoor and outdoor precise locations) & & & & \\ \cline{1-1} \cline{2-6}  & Real-time control drones/robots (e.g., & \multirow{2}{*}{0.42} & \multirow{2}{*}{10} & \multirow{2}{*}{0.29} & \multirow{2}{*}{12} \\  & drones/robots for automatic real-time patrols) & & & & \\ \hline \multirow{4}{*}{Community} & AI guide system for village information (e.g., & \multirow{2}{*}{0.16} & \multirow{2}{*}{12} & \multirow{2}{*}{0.44} & \multirow{2}{*}{10} \\  & crime prevention safety zones) & & & & \\ \cline{1-1} \cline{2-6}  & Improved parking environment system (e.g., & \multirow{2}{*}{0.37} & \multirow{2}{*}{11} & \multirow{2}{*}{0.74} & \multirow{2}{*}{6} \\ \cline{1-1} \cline{2-6}  & shared parking, illegal parking reporting) & & & \\ \cline{1-1} \cline{2-6}  & Smart safety community (e.g., Safe return & \multirow{2}{*}{0.46} & \multirow{2}{*}{8} & \multirow{2}{*}{0.40} & \multirow{2}{*}{11} \\ \cline{1-1} \cline{2-6}  & home for women, safety booths) & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 12: Results of fuzzy TOPSIS for alternatives by city size. Large cities in the Seoul metropolitan area ranked platform services relatively higher. In terms of priority, the crime monitoring system ranked second (fourth in small and medium-sized cities in other provinces), the mobile crime prevention app ranked sixth (ninth in small and medium-sized cities in other provinces), and real-time control drones/ robots ranked tenth (twelfth in small and medium-sized cities in other provinces). The abovementioned findings seem to reflect the needs in the Seoul metropolitan area for more effective and maximized crime prevention and real-time response with advanced technologies based on previously established control infrastructure.