​Expert

​Resistance to filtration failure after repair, Ps

​Reduction of residual permeability, 1-Ks

​Recovery capacity, Hs

​Timeliness of defect detection, Ms

​E1

​36

​24

​20

​20

​E2

​34

​26

​21

​19

​E3

​35

​25

​18

​22

​E4

​37

​23

​20

​20

​E5

​33

​26

​22

​19

​E6

​35

​26

​19

​20

​Average score

​35

​25

​20

​20

​Weight

​0.35

​0.25

​0.20

​0.20

​Coefficient of variation

​0.04

​0.05

​0.07

​0.05