Table 4 Assessments of system usability.

From: Intelligent escalator passenger safety management

Staff, number

Pro

Cont

Lie

Neutral

Results

Assistant to low mobility groups (disabled)

73

34

17

3

49

34%

Escalator operator

89

41

5

1

54

72%

Subway controller

76

32

19

7

49

26%

Guard

91

28

23

9

49

10%

Mechanics specialist

83

23

19

13

58

8%

Hydraulics specialist

79

26

14

11

60

24%

Electrician

62

21

13

24

66

16%

In total, by average

     

27.1%

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