Figure 4
A line graph showing degradation risk probability over time. The x axis represents time in days ranging from 0 to 150. The y axis represents degradation risk probability ranging from 0 to 1. The graph includes two lines: a solid blue line representing the predicted trajectory using an LSTM model and a dashed orange line representing observed data. Key phases are marked, including an early warning phase around 60 days and a rapid degradation acceleration phase around 90 days. The graph also highlights a critical risk zone starting around 120 days. All values are approximated.Predicted vs. observed degradation trajectories. Source: Authors’ own work