## 3 Materials and Methods
### Results
#### 4.2.1 Results--General Information Survey
There are several reasons why passengers prefer this type of check-in, such as convenience,  
Figure 10: Survey results: **(a)** Structure of surveyed respondents regarding the influence of ticket price on airline choice; **(b)** Structure of surveyed respondents regarding the influence of the available space on the perception of service quality at the airport passenger terminal; **(c)** Structure of surveyed respondents’ willingness to accept a lower level of service; **(d)** Structure of surveyed respondents’ willingness to wait in line (check-in); **(e)** Structure of surveyed respondents’ willingness to wait (in other terminal facilities); **(f)** Structure of surveyed respondents’ willingness to use online check-in; **(g)** Structure of surveyed respondents according to reasons for avoiding self-service technology at the airport; **(h)** Structure of surveyed respondents’ willingness to use mobile applications at the passenger terminal; **(i)** Structure of surveyed respondents by number of greeters at the airport; **(j)** Structure of surveyed respondents by place of consumption/shopping, food, and drinks (airport vs. aircraft). flexibility, avoiding additional costs, etc. Namely, some airlines such as Ryanair charge an additional fee for check-in at the counter, while online check-in is free. Figure 10f: blue--completely disagree; red--disagree; orange--neither agree nor disagree; green--agree; purple--completely agree. The majority of respondents stated that one of the main reasons they avoid using self-service technology at the airport is due to technical issues, unforeseen difficulties, and the lack of support in case of problems (23.9%). This is followed by respondents who need human interaction (13.4%), and a portion of respondents (7.5%) who have a lack of confidence in self-service technology, as per Figure 10g. Figure 10g: blue--lack of confidence in self-service technologies; red--need for human interaction; orange--lack of knowledge of technology; green--feeling frustrated while using technology; purple--not avoiding the use of self-service technology. For the purpose of passing through the passenger terminal, the majority of respondents (82.3%) stated that they are willing to use mobile applications, as per Figure 10h. Mobile applications can provide passengers with various benefits such as flight tracking, check-in, information retrieval, loyalty programs, etc. In this way, passengers can obtain various useful pieces of information about airports such as the location of their gates, restaurants, and shops, which greatly facilitates passenger navigation while passing through the passenger terminal. Figure 10h: blue--completely disagree; red--disagree; orange--neither agree nor disagree; green--agree; purple--completely agree. The question about the usual number of people accompanying passengers upon arrival (or \"greeters\") at the passenger terminal was asked with the intention of obtaining information about the most common number of people accompanying passengers. Namely, this information is important due to the setting of new spatial parameters in the public hall. Greeters are people who come to the airport to see off passengers. They most often accompany passengers up to security control, provide support to passengers, help them with their baggage, etc. Among the respondents, the majority are those who have one person accompanying them (44.1%), followed by those who come alone (35.3%), and 20.6% of them stated that they have two or more people accompanying them, as per Figure 10i. Figure 10i: blue--no greater; red--one greater; orange--two or more greeters. The next two questions address airport shopping (e.g., spending on food and drinks) compared to onboard shopping. It is known that passengers have different priorities when it comes to shopping at the airport compared to onboard shopping. Some of the factors that influence their decision are the time they have available, the quality and choice of food, the choice of products, and the prices.