Field variables

Mean

Skewness

Range

Minimum

Maximum

Bins overloading delay time, min

314.36

2.98

2379

0

2379

Conveyor overloading delay time, min

371.27

0.81

995

20

1015

Preventive Maintenance delay time, min

172.19

2.62

608

37

645

Gas management delay time, min

30.44

2.10

211

0

211

AFC repair time, min

79.80

3.64

787

0

787

Chock supports repair time, min

303.08

1.90

1074

25

1099

Crusher repair time, min

12.30

4.05

203

0

203

Hydraulic pumps repair time, min

45.77

1.31

182

0

182

Gate Conveyor repair time, min

319.33

4.90

3581

0

3581

Maingate drive repair time, min

9

2.49

79

0

79

Shearer repair time, min

205.19

1.48

821

0

821

BSL repair time, min

118.30

2.28

760

0

760

Injury severity rate

158.19

1.93

1012.4

0

1012.4

Equipment downtime, min

2003.11

3.83

9051

639

9690

Productivity, t/hr

1468.21

−2.35

858.57

796.73

1655.3