Figure 5
The image contains four line graphs labeled Block 4, each depicting different track quality indices. Panel A on the left shows three line graphs: J Quality Index, TGI Quality Index, and W5 Quality Index. The horizontal axis represents a range from 0 to 300, and the vertical axis represents the quality index values. The J Quality Index graph shows a relatively stable trend with minor fluctuations, while the TGI Quality Index graph shows more pronounced peaks and troughs. The W5 Quality Index graph displays several significant spikes. Panel B on the right shows three line graphs: PROFILE, ALIGNMENT, and GAUGE. The horizontal axis represents a range from 0 to 300, and the vertical axis represents different units for each graph. The PROFILE graph shows fluctuations around a threshold value, the ALIGNMENT graph shows a similar pattern with more pronounced peaks, and the GAUGE graph shows relatively stable values with minor fluctuations.Left: J, TGI and W5 quality indices, right: EN quality index. Source: Figure courtesy of Movaghar and Mohammadzadeh (2020)