Table 8 SHAP feature importance values.

From: Estimating the surface chloride concentration of marine concrete utilizing advanced hybrid machine learning models

Feature

Mean SHAP Value

Percentage Contribution

Cumulative Percentage

Fine agg

0.1867

30.7500

30.7500

T

0.1079

17.7700

48.5200

Exposure type

0.1035

17.0500

65.5800

Cl content

0.0497

8.1900

73.7700

OPC

0.0457

7.5200

81.2900

Coarse agg

0.0357

5.8800

87.1700

T

0.0341

5.6200

92.7900

SP

0.0121

2.0000

94.7900

WC

0.0117

1.9200

96.7100

SF

0.0080

1.3100

98.0300

FA

0.0062

1.0300

99.0500

GGBS

0.0033

0.5400

99.5900

W/B

0.0025

0.4100

100.0000