## 3 Results
### Step 0: Identify Case Study and Analysis Accident Data
#### 3.1.3 UAS Accident Data  
To inform the risk assessment and prioritization process, an analysis of historical UAS accident data was conducted. This analysis aims to identify common causes and  
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Stakeholder ID** & **Stakeholders** & **Linked Stakeholders** \\ \hline SH-1 & Local Government and Municipal Authorities & Approve and oversee budgets for system implementation and operation, enact relevant policies and regulations, and monitor and evaluate system operation performance. \\ \hline SH-2 & Emergency Service Agencies (Fire Departments, Emergency Medical Services, etc.) & Rapid response is based on information collected through the system, establishing system operating procedures, participating in drills, and effective collaboration with the system during on-site response. \\ \hline SH-3 & Department Personnel (Administrator, Pilot, Manager, etc.) & System operation, maintenance, and data analysis, rapid response and reporting in the event of an abnormal situation, performing cooperative work with other departments and organizations. \\ \hline SH-4 & Community Groups (Citizen Advisory Committees, Privacy Advocates, Community Members, etc.) & Providing opinions on system introduction and operation, monitoring activities to protect privacy and civil liberties, and acting as a communication channel between the community and the system operating organization. \\ \hline SH-5 & Lawmakers and Policy Makers & Enact system-related laws and policies, oversee the legality and ethics of system operations, and mediate and arbitrate conflicts of interest among stakeholders. \\ \hline SH-6 & Other Government Agencies (urban planning, transportation, public safety, etc.) & Coordination with policies and projects in related fields such as urban planning, transportation, public security etc., joint utilization, and cooperation of information collected through the system. \\ \hline SH-7 & Media & Raising public awareness of system introduction and operation, objective reporting on system performance and issues, promoting communication among stakeholders, and shaping public opinion. \\ \hline SH-8 & Citizens & Express opinions on system introduction and operation, participate in community safety and policing activities, monitoring and reporting system misuse and adverse events. \\ \hline SH-9 & Technology Providers & Build and provide technical support for the system, identify the latest technology trends, and propose ways to apply them, as well as training and technical support for system operating organizations and end users. \\ \hline \hline \end{tabular}
\end{table}
Table 1: List of stakeholders and their roles.  
consequences of UAS accidents, providing a data-driven foundation for the subsequent steps in the framework.  
These accident data were obtained from two primary sources: the UK Air Accidents Investigation Branch (AAIB) database and the NASA Aviation Safety Reporting System (ASRS) database.  
The AAIB database, accessible at [[https://www.gov.uk/aaib-reports](https://www.gov.uk/aaib-reports)]([https://www.gov.uk/aaib-reports](https://www.gov.uk/aaib-reports)) (accessed on 26 February 2024), was queried by setting the category filter to \"Unmanned Aircraft Systems (UAS)\". This initial search yielded 80 reported incidents/accidents. After removing duplicates and noise from the dataset, a total of 61 relevant UAS accident reports were identified for analysis.  
The ASRS database, available at [[https://asrs.arc.nasa.gov/search/database.html](https://asrs.arc.nasa.gov/search/database.html)]([https://asrs.arc.nasa.gov/search/database.html](https://asrs.arc.nasa.gov/search/database.html)) (accessed on 26 February 2024), was searched using the \"Text: Narrative/Synopsis\" field with the keywords \"drone\", \"UAV\", or \"UAS\". The search returned approximately 1000 incident reports. Following the removal of duplicates and noise, a total of 397 UAS-related incident/accident reports were selected for further analysis.