## 3 Materials and Methods
### Methods  
#### 3.2.1 Questionnaire Design  
This section conducts an empirical analysis with service evaluation based on decision-making techniques to introduce intelligent CPTED systems in municipal control centers. A robust survey design is required for reliable service evaluation. First, the structure of the study was designed, including alternatives, evaluation criteria, hierarchy, questionnaire design, and the selection of evaluators. Alternatives were intelligent CPTED systems derived in Section 3.1. This study reviewed major public sector guidelines for evaluating the value of technologies and services in Korea. After reviewing the Smart City Service Certification System [48], Korea Technology Finance Corporation Technology Evaluation [49], and Ministry of Land, Infrastructure, and Transport Technology Value Evaluation Manual [50], this study found that these guidelines had common evaluation criteria, such as conformity, technology, and marketability for evaluation. Finally, the following three evaluation criteria were selected for this study: conformity with the purpose of crime prevention, service suitability, and feasibility. This study used the sub-category evaluation criteria, which were the evaluation items derived from categories. More specifically, conformity with the purpose of crime prevention consisted of crime prevention effectiveness and policy conformity, while service suitability consisted of competitiveness between existing services and growth in the service sector. Feasibility consists of field applicability and sustainability (Table 4). \begin{table}
\begin{tabular}{p{56.9 pt} p{113.8 pt} p{113.8 pt}} \hline \hline
**Service Content (Category)** & **Service Sub-Element (Sub-Category)** & **RIN** & **Description** \\ \hline \multirow{6}{*}{AI and CCTV (A)} & AII\_CCTV system for AI & AII\_RPI\_B1 & High-resolution CCTV systems added with features improved to enable crime analysis \\ \cline{2-4}  & AI2\_AI analysis for living safety & AI2\_RPI\_A4B2B6 & Detection for littering, illegal parking, drunk people/smoking/juvenile delinquents \\ \cline{2-4}  & AI2\_AI analysis for crime prevention & AI3\_RPI\_A4B2B3B4B5 & Automated tracking for suspects, facial recognition (e.g., missing people and older adults with dementia), and assault detection \\ \hline \multirow{6}{*}{IoT and lighting (I)} & IoT1\_IoT automatic system & \multirow{2}{*}{IoT2\_Intelligent pedestrian environment system} & \multirow{2}{*}{IoT2\_R\_C6C7F2} & Walking guide lights for pedestrian safety at night, floor lighting (logo projectors), and school zone signal delays \\ \cline{2-4}  & IoT3\_Smart street lights & IoT3\_RL\_C34D1D2D3D4 & Multifunctional smart street lights with scream recognition, voice warnings, emergency bells, and safety information \\ \hline \multirow{6}{*}{Platform (P)} & Plat1\_Crime monitoring system & Plat1\_Cr2\_A1A2A3A4A7 & Crime prevention platform in the control center, including crime maps, CCTV analysis, and automatic link to 112 \\ \cline{2-4}  & Plat2\_Mobile crime prevention app & Plat2\_C2\_A4A5 & Smartphone app identifying real-time indoor and outdoor precise locations for children and women returning home \\ \cline{2-4}  & Plat3\_Real-time control drones/robots & Plat3\_C2\_A4A6 & Drones/robots for automatic real-time patrols in crime-prone areas \\ \hline \multirow{6}{*}{Community (C)} & Com1\_AI guide system for village information & Com1\_G\_F1G1G2G3 & AI-based information board for living safety and convenience information, crime prevention safety zones, foreign language guide (in areas highly populated by foreigners) \\ \cline{2-4}  & Com2\_Improved parking environment system & Com2\_P2\_A4G4G5 & Improved parking environment with shared parking (generating revenue) and smartphone-based illegal parking reporting \\ \cline{2-4}  & Com3\_Smart safety community & Com3\_C1U\_A4G1G2G3 & Safe return home for women, safety booths, smart shelters, and smart garbage storage facilities \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Technology elements of CPTED-based crime prevention services.