Fig. 3: RF-based feature importance ranking.

MDI: (a) UTS; (b) EL; (c) Hardness. PI: (d) UTS; (e) EL; (f) Hardness. The MDI and PI results are obtained from the average values of 100 random runs. The boxplot exhibits the first quartile (Q1, bottom of the boxes), second quartile (Q2, also known as the median), and third quartile (Q3, top of the boxes). The interquartile range (IQR) is defined as (Q3 - Q1), and the whiskers represent the range (Q1 - 1.5 IQR, Q3 + 1.5 IQR). Values outside the whiskers are considered outliers and have been removed from the figure.