Table 13 Scheme evaluation scales and meanings.

From: An optimal selection method for exterior design schemes of subway trains based on multi-level gray relational analysis

No

Evaluation scales

Scoring range

1

Failed

[0, 59]

2

Barely passed

[60, 69]

3

Average

[70, 79]

4

Good

[80, 89]

5

Excellent

[90, 100]