## 4 Application of TX Plant Simulation to Improve the Performance of the Production Process
### Simulation of the Production Process  
For the simulation of the production process, we used the PLM software Tecnomatrix Plant Simulation, which was developed for this purpose. The process was simulated in 2D and the program used a drawing of the production hall of the selected organization as a basis for the layout of individual machines, lines, and conveyor belts according to the actual layout. Figure 4 shows the model of the whole production process in the hall of the organization, along with the marked direction of material flow. Then, in order to highlight the ongoing activities and processes and provide a smooth transition to the simulation, we describe the actual production activity taking place on the production floor. The simulation method concentrates on the production step that is most important, or the step that slows down a certain production hall's production process the most. This entails specifically the movement of the filament on sliding belts across the long center area of the production hall, while the filaments A, C, and D are still being transported. The filament designated B is already at the inspection station. The figure shows a model of the production process with marked objects in the production hall. The objects marked by the number \"1\" are containers in which the granulate is located and from which this granulate is poured into the machines to produce fiber itself, which are marked with the number \"2\". Here, the granulate becomes a fiber, which continues for treatment. The fiber treatment machines are marked by the number \"3\". From there, the fiber is moved by belts for inspection by workers. The inspection workplaces are marked by the number \"4\", and the number \"5\" marks the place reserved for workers from where they go to inspect the thread to the inspection workplaces. The number \"6\" indicates packaging machines, and the number \"7\" represents the storage and dispatch of fiber in the storage areas. It is clear from Figure 4 that everything essential takes place outside the central part of the production hall, which is shown in Figure 4 and marked in blue and by the letter C. Since the process of the simulation process cannot be shown in its entirety, Figure 5 shows a critical part of the production process, which is to be improved by the present study. Figure 4: Model of the production process. During the simulation process, the most critical part, which slows down the whole production, is when the fiber is moved on the belts through the middle part of the production hall. While fiber B arrived at the inspection site, fibers A, C, and D are still being transported through the long central part of the production hall. Workers who inspect the product will set off from the spot marked \"E\" only after the fiber arrives at the inspection site. This is also because the place reserved for inspectors is located at a considerable distance from the place of inspection. The controller worker receives a message from a computer in his reserved place that the thread is ready for inspection at his inspection workplace. Only then does the worker arrive at the inspection site, and this also takes a lot of time due to the disproportionately large distance between the place reserved for the inspectors and the inspection site. However, the other inspectors must wait for the A, C, and D fibers to be transported to their workplaces. It is at this stage of the production process that time, energy, and human resources are wasted, and a proposal for improvement will be focused on this phase. After the simulation, Tecnotaxic Plant Simulation can generate a lot of information about the simulation, graphs, tables and statistics. A very important piece of information is the duration of the entire production process, which is marked in red in Figure 6.  
According to Figure 6, the duration of the production process is one hour, fifty-six minutes and fifty-five seconds. This is the time from when the granulate is poured into the fiber production machine until the fiber is shipped away.