## 4 Application of TX Plant Simulation to Improve the Performance of the Production Process
### Simulation of the Production Process after Relocation of Workplaces  
The course of the simulation of the production process is shown in Figure 9. The simulation takes place after the changes in the layout of the individual workplaces in the production hall. Figure 8: Relocation of workplaces in the production hall. Figure 9 shows that the inspectors start working at the inspection workplace almost at once. Workers marked A, B, and C are already inspecting, and the worker marked \"D\" is moving to the workplace but needs to walk half the distance than that in the simulation with the original workplace layout. It follows that he will arrive at the workplace earlier that before. This distribution of workplaces should lead to a reduction in the time of the entire production process, an increase in production, and a reduction in the percentage of material transport during the process. After performing this simulation, the program again generated a lot of statistics and graphs. The most important ones in this case are the basic statistics of the production process in Figure 10.  
As we can see, the distribution of workplaces according to lean production really shortened the duration of the production process. After the changes were made, the duration of the process, marked in red in Figure 10, reached one hour, fifty-three minutes and thirteen seconds. This represents a reduction in time compared to the original workplace layout by three minutes and forty-two seconds. The percentage of production marked with yellow increased by 1.57% compared to the original deployment, and the percentage of material transport decreased from the original 2.04% to the current 0.47% due to the shortening of the length of the conveyor belts, which represents a decrease of 1.57%. Such values are not a huge leap in increasing process performance, but it must be considered that these results were achieved after simulating a single fiber production process. In the selected organization, however, this process is repeated twenty-four hours a day. In the long run, such distribution of workplaces in a production hall can bring the organization an increase in current profits by tens of thousands of euros per year. A relocation of individual workplaces and a more efficiently located place reserved for inspectors should also be reflected in the results of the simulation. To compare the statistics of the inspectors and their activities during the production process, Figure 11 shows the percentage distribution of the controller's activities over the duration of the entire production process. Figure 10: Statistics of simulated process after applied changes. Figure 9: Course of the simulation after the changes in the layout of workplaces. From Figure 11, it is clear that changing the location of the place reserved for inspectors did not decrease, but on the other hand, it increased the waiting time for fibers from the original 89.1% to the current 92.6% (marked with gray). However, time spent walking to the workplace was reduced from the original 1.0% to the current 0.1% (marked with blue); the time required to perform the work was also reduced from 8.9% to 6.6% (marked with green), and the time required to prepare the fiber control also shortened from 0.9% to 0.7% (marked with orange). Thus, the waiting time for fibers increased by 3.5%, time spent walking to the workplace decreased by 0.9%, time required to perform the work decreased by 2.3%, and the preparation time for fiber inspection decreased by 0.2%. It can be stated that the relocation of the space reserved for inspectors did not have a significant effect on shortening the time of the production process. Although there were changes in the ratio of the individual activities of the controller during the production process, the shortening of time had only a minimal effect. It follows that the use of the central part of the production hall, and thus the shortening of the length of the conveyor belts, had the greatest effect on increasing the efficiency of the production process.