## 3 Method
### Literature Search Process
#### 3.1.4 Exclusion and Eligibility Criteria  
Due to the large number of articles retrieved from the Scopus database based on the selected keywords, the scope of the search results was narrowed using a process that evaluated the results based on eligibility and exclusion criteria. For the initial screening (first screening), exclusion criteria were applied, as shown in Table 2. The purpose of the exclusion criteria was to reject articles that were irrelevant to the topic from the outset.  
\begin{table}
\begin{tabular}{c c c} \hline \hline
**No.** & **TITLE-ABS-KEY** & **Papers** \\ \hline \multirow{3}{*}{1} & “fuzzy logic” OR “fuzzy system” AND “risk analysis” & 84 \\  & AND “Industry” & \\
2 & “fuzzy logic” OR “fuzzy system” AND “risk analysis” & 589 \\
3 & “neural network” AND “risk analysis” AND “safety” & 67 \\
4 & “genetic algorithms” AND “risk analysis” & 37 \\  & AND “safety” & 3 \\  & “Computational Intelligence” AND “risk analysis” & 3 \\  & AND “safety” & 20 \\
6 & “machine learning” AND “risk analysis” & 21 \\  & AND “safety” & 22 \\
7 & “fuzzy logic” AND “risk assessment”AND & 23 \\  & “occupational” and “risk analysis” & 24 \\
8 & “machine learning “ AND “risk assessment” AND & 25 \\  & “occupational risk analysis” & 26 \\
9 & “genetic algorithms” AND “risk assessment” AND & 27 \\  & “occupational risk analysis” & 28 \\
10 & “ neural network “ AND “risk assessment” AND & 29 \\  & “occupational risk analysis” & 29 \\ \hline \hline \end{tabular}
\end{table}
Table 1: List of search keywords used in Scopus.  
\begin{table}
\begin{tabular}{c c} \hline \hline
**No.** & **Criteria Table** \\ \hline C1 & Articles not written in English are rejected. \\ C2 & Articles from national conferences are rejected. \\ C3 & Duplicates are rejected. \\ C4 & Articles related to healthcare or economics, despite using the four techniques under examination. \\ \hline \hline \end{tabular}
\end{table}
Table 2: Exclusion criteria (first screening).  
The exclusion criteria included the elimination of non-English articles, articles from national conferences, articles related to medical or general health risks, and articles focused on economic risk or general financial risks. Criterion C4 was the one that rejected the largest number of articles. This approach resulted in the rejection of a significant number of articles (234) containing information not related to the subject under examination. The number of remaining articles was \(n=748\).  
Subsequently, eligibility criteria were applied for a second filtering (second screening), as shown in Table 3. The ultimate goal of the eligibility criteria was to establish targeted filters to narrow the search results specifically to the topic of the literature review. Specifically, the following were retained: (a) articles that addressed at least one of the four techniques under examination (fuzzy logic, neural networks, genetic algorithms, and machine learning), (b) articles focused on workplace safety with an emphasis on humans, and (c) articles that referred to risk analysis related to human factors, excluding external factors such as material failure or wear.  
After this second screening, the number of articles was significantly reduced, leaving \(n=415\).  
The third and final stage of screening (third screening) was conducted manually. Beyond the keywords, the abstract of each article was reviewed. This process identified potential inaccuracies from the criteria used in the earlier screenings, such as articles that mainly addressed material-related risk or workplace safety intertwined with health concerns, which were essentially health-oriented. Such studies were excluded, and only those directly relevant to the subject under examination were retained.  
After the final screening, the remaining articles totaled \(n=296\). Information from these articles was utilized to address the research questions and to compile Table A1 in Appendix A.  
These final articles formed the basis for answering the research questions and constructing Table A1 in Appendix A.