## 4 The Results  
### Dangerous Goods Acceptation (DGA) Process  
At the beginning of the research, a detailed analysis of the DGA process was conducted. Observations, interviews, as well as studies on law regulations (mainly IATA and ICAO regulations and publications) let us identify a process model, including data flow through the process. A simplified graphical model of the DGA process is presented in Figure 1.  
Figure 1 presents main stages of the DGA process together with the kind of data that must be provided to an operator to verify whether a DG shipment can be safely transported by air transport. Depending on the type of a hazardous material, a specialized DG operator is required to check and confirm the correctness of every process element \begin{table}
\begin{tabular}{c c c} \hline
**Aims of a Research Stage** & **Research Stage** & **Research Methods** \\ \hline development of decision algorithms & \begin{tabular}{c} designing and programming of AR \\ application for the chosen AR solutions \\ (AR googles and a mobile phone) \\ \end{tabular} & interviews with managers and operators \\ \hline results evaluation & AR application testing & experiments in laboratory conditions \\ \cline{2-3}  & \begin{tabular}{c} AR application testing \\ conditions \\ \end{tabular} & \
\begin{tabular}{c} experiments in airport operational \\ conditions \\ \end{tabular} \\ \cline{2-3}  &
\begin{tabular}{c} survey among operators \\ \end{tabular} \\ \hline \end{tabular}
\end{table} 
Table 1: _Cont._  
Figure 1: Model of DGA. [Own elaboration]. (chosen procedures, packaging type, marking, labelling, etc.). The basic formal regulations, which are used when accepting DGs in airports all over the world, are the dangerous goods regulations (DGRs) established by the IATA. They include the general rules, which are accepted by worldwide airports, as well as specific requirements that are mandatory in a country or an airline. The operator confirms the correctness of the DGA process by completing an appropriate acceptance checklist in which they subsequently confirm or deny the completion of the relevant requirements of the shipment. Control questions can be in a general form (prepared by the IATA) or in a special form resulting from the destination country for the shipment or the airlines that are to transport the cargo. In order to make decisions in every process stage (e.g., which acceptance list should be used, whether a weight criterion is positively satisfied, which graphical labels should be placed on a shipment's outer packaging), the operator must have access to the details of the shipment and its planned journey, and they also must understand all decision algorithms; this should be mandatory while preparing a DG shipment for safe transport (e.g., the method of shipment labelling depends on: the type of DG, the weight of the DG in a single package and the resulting assignment method and flight type). Figure 2 depicts a fragment of the IATA general acceptance list to indicate how high levels of information details must be provided by a DG operator for every DG shipment. The chosen list fragment presents 19 out of a total 53 questions, mainly on the marking and labelling area, which is considered as one of the most important aspects regarding potential AR support. The aim of the DGA process is to control and verify whether a DG shipment may be transported by an airplane, assuming, in accordance with the world law regulations and the operational practice, the correct execution of all controls should provide safety during the flight transporting of the checked shipment. For these reasons, the main result which must be considered when evaluating or planning a DGA process is its reliability. Reliability in this case is understood as the probability that an incorrectly prepared (in any aspect) DG  
Figure 2: A fragment of the IATA general acceptance list for non-radioactive dangerous goods [8]. shipment will be discovered and will not be approved for placement in an airplane due to being a threat to the flight.