## 3 Findings and Discussion
### Evaluation of Alternatives for Airport Transfer Center Selection  
#### 3.3.1 Identification of Alternative Airport Terminals  
Turkije boasts numerous airport terminals. Several airport terminals, including Istanbul Airport, Ankara Airport and Izmir Airport, serve as significant transfer centers. The  
\begin{table}
\begin{tabular}{l l l l l l l l l} \hline \hline
**Pairwise Comparison** & \multirow{2}{*}{**CRI1**} & \multirow{2}{*}{**CRI2**} & \multirow{2}{*}{**CRI3**} & \multirow{2}{*}{**CRI4**} & \multirow{2}{*}{**CRI5**} & \multirow{2}{*}{**CRI6**} & \multirow{2}{*}{**CRI7**} & \multirow{2}{*}{**Priorities**} \\
**Matrix for Criteria** & & & & & & & & \\ \hline
**CRI1** & 0.438 & 0.539 & 0.295 & 0.444 & 0.436 & 0.394 & 0.292 & 0.406 \\
**CRI2** & 0.109 & 0.135 & 0.295 & 0.074 & 0.218 & 0.169 & 0.167 & 0.167 \\
**CRI3** & 0.146 & 0.045 & 0.098 & 0.148 & 0.055 & 0.169 & 0.125 & 0.112 \\
**CRI4** & 0.073 & 0.135 & 0.049 & 0.074 & 0.109 & 0.028 & 0.083 & 0.079 \\
**CRI5** & 0.109 & 0.067 & 0.197 & 0.074 & 0.109 & 0.169 & 0.125 & 0.122 \\
**CRI6** & 0.063 & 0.045 & 0.033 & 0.148 & 0.036 & 0.056 & 0.167 & 0.078 \\
**CRI7** & 0.063 & 0.034 & 0.033 & 0.037 & 0.036 & 0.014 & 0.042 & 0.037 \\ \hline
**Total** & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 \\ \hline \hline \end{tabular}
\end{table}
Table 6: Inter-criteria normalization matrix and priority values.  
\begin{table}
\begin{tabular}{l l l l l l l l} \hline \hline
**All Priorities Matrix** & \(\boldsymbol{\lambda}\) & \(\boldsymbol{\lambda}\)**max** & **CI** & **CR** \\ \hline
3.174 & 7.827 & & & & & \\
1.309 & 7.850 & & & & & \\
0.867 & 7.721 & & & & & \\
0.604 & 7.661 & 7.668 & 0.111 & 0.084 \\
0.955 & 7.858 & & & & & \\
0.575 & 7.346 & & & & & \\
0.273 & 7.413 & & & & & \\ \hline \hline \end{tabular}
\end{table}
Table 7: Consistency ratio calculation between criteria.  
\begin{table}
\begin{tabular}{l l l l l l l l} \hline \hline
**Pairwise Comparison** & \multirow{2}{*}{**CRI1**} & \multirow{2}{*}{**CRI2**} & \multirow{2}{*}{**CRI3**} & \multirow{2}{*}{**CRI4**} & \multirow{2}{*}{**CRI5**} & \multirow{2}{*}{**CRI6**} & \multirow{2}{*}{**CRI7**} \\
**Matrix for Criteria** & & & & & & & \\ \hline
**CRI1** & 1.000 & 4.000 & 3.000 & 6.000 & 4.000 & 7.000 & 7.000 \\
**CRI2** & 0.250 & 1.000 & 3.000 & 1.000 & 2.000 & 3.000 & 4.000 \\
**CRI3** & 0.333 & 0.333 & 1.000 & 2.000 & 0.500 & 3.000 & 3.000 \\
**CRI4** & 0.167 & 1.000 & 0.500 & 1.000 & 1.000 & 0.500 & 2.000 \\
**CRI5** & 0.250 & 0.500 & 2.000 & 1.000 & 1.000 & 3.000 & 3.000 \\
**CRI6** & 0.143 & 0.333 & 0.333 & 2.000 & 0.333 & 1.000 & 4.000 \\
**CRI7** & 0.143 & 0.250 & 0.333 & 0.500 & 0.333 & 0.250 & 1.000 \\ \hline
**Total** & 2.286 & 7.417 & 10.167 & 13.500 & 9.167 & 17.750 & 24.000 \\ \hline \hline \end{tabular}
\end{table}
Table 5: Pairwise comparison matrix for criteria.  
hubs considered for the selection of the new airport hub were chosen based on criteria such as maximizing geographical coverage across Turkiye and ensuring extensive utilization within their respective regions. The chosen hub airports for the new transfer center are listed in Table 8 and shown in Figure 4.  
The new Cukurova Airport, constructed to enhance the capacity of Adana Airport in Adana, is scheduled to commence operations in 2024. The terminal, situated in the Tarsus district between Adana and Mersin provinces, is intended to alleviate the load on the existing Adana Airport [25].  
Antalya and Mugla Airports experience a surge in flight volume, particularly during peak holiday seasons, making them pivotal hubs for increased air traffic. The remaining selected terminals, Erzurum and Sivas Nuri Demirag Airports, are strategically positioned in the Eastern Anatolia Region of Turkiye, offering opportunities for further development. Two of the alternative airports were chosen from the Mediterranean region, one from the Aegean and two from the Eastern Anatolia Region. No selection was made for airports from the Marmara and Central Anatolia regions as they are already being used as transfer terminals.