## 4 Results  
The overall evaluation results for the fine-tuned Davinci-002 and LLaMA2-13B models are presented in Figure 4. LLaMA2-13B model outperformed the Davinci-002 model with a higher average score and a higher frequency of the top score. The average scores of the LLaMA2-13B and Davinci-002 models were 3.56 and 2.82, respectively. The median of the LLaMA2-13B model was 5, which indicates that the LLaMA2-13B model correctly responded to more than half of the entire questions in the test dataset. Meanwhile, the median of the Davinci-002 model was 2.5, which indicates that half of the responses produced by the Davinci-002 model were evaluated to be inadequate. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Rating** & **Description** \\ \hline \multirow{3}{*}{3} & Give this score to answers that convey the overall meaning and include keywords, but have unnecessary additions or are missing important information. The core message should be delivered without major inaccuracies. \\ \hline \multirow{2}{*}{2} & Answers that are related to the question but are inaccurate or have low reliability due to incorrect information. \\ \hline \multirow{2}{*}{1} & The lowest score is given to answers that are completely irrelevant or whose meaning is not understandable. \\ \hline \hline \end{tabular}
\end{table} 
Table 4: _Cont._ \begin{table}
\begin{tabular}{c c c} \hline \hline
**Rating** & **Class** & **Example** \\ \hline \multirow{5}{*}{5} & Prompt & Based on the CCC company specifications, what is the required offset for longitudinal beams in adjacent shell rings? \\ \cline{2-3}  & Exemplary answer & According to the CCC company specifications, adjacent shell rings should be offset by a minimum of four times the plate thickness or 150 mm (6 in). \\ \cline{2-3}  & LLM’s response & A longitudinal seam in adjacent shell courses (or rings) should be offset by at least four times the plate thickness or 150 mm (6 in), whichever is greater, according to CCC company specifications. \\ \hline \multirow{5}{*}{3} & Prompt & According to the CCC company specifications, how much offset is required for longitudinal beams in adjacent shell rings? \\ \cline{2-3}  & Exemplary answer & CCC specifications require longitudinal beams in adjacent shell rings to be offset by a minimum of four times the plate thickness or 150 mm (6 in). \\ \cline{2-3}  & & A longitudinal seam in adjacent courses must clear the outside diameter of the vessel by four times the thickness of the plate, or 150 mm (6 in), whichever is greater, according to the CCC company’s specification. The last course of the higher side and five times the thickness of the plate should be subjected to 100\% examination in accordance with section (6.3) or (6.4). The minimum distance between the last longitudinal seam of the adjacent nozzle and the nozzle reinforcing pad is 50 mm (2 in), or three times the wall thickness, whichever is greater. Overlap of longitudinal beams in adjacent vessels \(\ldots\), longitudinal beams in adjacent vessels or sections of vessels should not be overlapped by more than 150 mm (6 inches) or 5 \\ \hline \multirow{5}{*}{1} & Prompt & What is the design specification for carbon steel anchor bolting according to the AAA company? \\ \cline{2-3}  & Exemplary answer & It is necessary to search for other related specifications. \\ \cline{2-3}  & LLM’s response & The material specification, 22 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Representative evaluation examples. The frequency of the highest score was high for the LLaMA2-13B model for all specification types, and the frequency of the lowest score was low for the Davinci-002 model, all showing a similar pattern to the overall results. Among the four specification types, three types except the corrosion allowance type showed results in which the LLaMA2-13B model had the highest score of more than 50% (Table 6).