## 3 Results
### Fta  
FTA (Fault Tree Analysis) is a structured graphical representation of the conditions that lead to or contribute to the occurrence of a specific undesirable event, known as the top event [30]. The fault tree is designed in a way that allows it to be easily understood, analyzed, and, if needed, modified to facilitate the identification of the fault being monitored. This approach enables the examination of various contexts within the system, as well as its subsystems. The goals of this procedure are as follows:  
* Represent the causal dependency model to investigate the reliability and safety of the monitored system, in order to understand the input-output interactions;
* Define the failure frequency in the system or any of its components;
* Provide a clear analytical representation of the logical operations within the monitored system;
* Present the monitored system as a graphical model in which both quantitative and qualitative data are recorded. Fault tree creation procedure:  
1. Define the system under analysis, the purpose and scope of the analysis, and the basic assumptions made. 2. Define the fault. Specifying an undesirable fault involves identifying the onset of unsafe conditions or the system's inability to perform required functions. \begin{table}
\begin{tabular}{c l c c c c c} \hline \hline  & \multicolumn{2}{c}{**Process**} & \multicolumn{4}{c}{**Factors**} & \multicolumn{1}{c}{**P**} \\ \hline
**Step** & **Activity Description** & **K1** & **K2** & **K3** & **K4** & **K5** & **(EO)** \\ \hline
8 & Bottling & & & & & & \\ \hline
9 & During filling, the bottle cooling function and & & & & & & \\  & bottle temperature are checked & 0.001 & 1 & 0.5 & 1 & 3 & 0.0015 \\ \hline
10 & Closing the filling valves at the acetylene inlet on & 0.001 & 0.5 & 1 & 1 & 7 & 0.0035 \\ \hline
11 & When the compressors are switched off, the inlet & & & & & & \\  & valves on the ramps are closed & & & & & & \\ \hline
12 & Closing the bottles & 0.001 & 0.5 & 1 & 1 & 7 & 0.0035 \\ \hline
13 & Opening the degassing valves & 0.001 & 0.5 & 1 & 1 & 7 & 0.0035 \\ \hline
14 & Ramp degassing & 0.01 & 1 & 0.5 & 1 & 1 & 0.005 \\ \hline
15 & Degassing valves closing & 0.001 & 1 & 0.5 & 1 & 3 & 0.0015 \\ \hline
16 & Bottle securing & 0.001 & 0.5 & 1 & 1 & 7 & 0.0035 \\ \hline
17 & Tightness inspection & 0.001 & 1 & 0.5 & 1 & 3 & 0.0015 \\ \hline
18 & Bottle weighing & 0.001 & 0.5 & 1 & 1 & 3 & 0.0015 \\ \hline
19 & Bottle and ramp valve closing & 0.001 & 0.5 & 1 & 1 & 7 & 0.0035 \\ \hline
20 & Transport to the handling area & 0.001 & 1 & 0.5 & 1 & 7 & 0.00035 \\ \hline
21 & Record in the production record & 0.001 & 0.5 & 1 & 1 & 7 & 0.0035 \\ \hline
22 & Records of imported empty bottles, dispatched & & & & & & \\  & bottles and full bottles & & & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: _Cont._3. Create a graphical representation consisting of individual elements connected by logical operations, describing the monitored process. It is important to distinguish between conditioned and unconditioned states during this step. 4. Evaluate the fault state tree. 5. Conduct a logical (qualitative) analysis of the system. 6. Perform a numerical (quantitative) analysis of the system. 7. Assess the plausibility of the information for critical system elements. Determine the diagnostic approaches for improving the existing condition. Steps 1,2, and 3 are carried out as part of the preliminary risk assessment, while steps 4,5, and 6 are specific to this method. The FTA itself is simply a display and calculation of values for already identified events. Each fault tree represents a specific causal dependency of a specific technical object. The FTA tracks the input/output interactions of defined system or subsystem functions [30,31]. At the same time, possible deviations depending on the change of components and functional links are tracked. An undesired disturbance must be defined with respect to the type of intended analysis (reliability, safety, etc.). The analysis criteria must be proportionate to the purpose of the analysis.