From: Contribution quality evaluation of table tennis match by using TOPSIS-RSR method - an empirical study
Evaluation grade
A-grade
B-grade
C-grade
D-grade
E-grade
Value range
 ≥ 0.80
0.60 ~ 0.79
0.40 ~ 0.59
0.20 ~ 0.39
 ≤ 0.19