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Table 4 Most optimal maintenance plan of 28 bridges using MMPF

From: Multi-year maintenance planning framework using multi-attribute utility theory and genetic algorithms

No

Bridge name

Current condition

Treatment name

Maintenance cost

Improved condition

Year 1

1

B74

3.65

Medium intervention

147,336.58

2.15

2

B719

3.36

Minor intervention

30,257.6

2.61

3

B291

3.35

Minor intervention

49,702.03

2.6

4

B822

4.04

Medium intervention

578,944.5

2.54

5

B223

3.27

Minor intervention

63,608.32

2.52

6

B842

3.07

Minor intervention

95,551.68

2.32

7

B723

3.42

Medium intervention

404,047.16

1.92

8

B428

3.24

Minor intervention

76,259.75

2.49

 

Yearly summary

Total yearly spending: 1,445,707.62 (24%)

  

Remaining budget: 4,554,292.38 (76%)

Year 2

9

B275

3.12

Minor intervention

102,202.4

2.37

10

B853

2.93

Minor intervention

110,745.5

2.18

11

B335

3.47

Medium intervention

242,006.54

1.97

12

B79

4.08

Medium intervention

356,609.97

2.58

13

B78

3.08

Minor intervention

120,244.48

2.33

14

B750

4.08

Medium intervention

222,261.69

2.58

15

B351

4.05

Medium intervention

175,173.64

2.55

 

Yearly summary

Total cost spent: 1,329,244.21 (22%)

  

Remaining budget: 3,225,048.17 (53%)

Year 3

16

B94

2.93

Minor intervention

116,274.03

2.18

17

B495

3.68

Medium intervention

119,176.0

2.18

18

B836

3.75

Medium intervention

238,610.66

2.25

19

B260

3.15

Minor intervention

55,593.66

2.4

20

B80

4.14

Major intervention

570,867.62

1.64

 

Yearly summary

Total cost spent: 1,100,521.97 (18%)

  

Remaining budget: 2,124,526.20 (35%)

Year 4

21

B751

4.35

Major intervention

356,589.91

1.85

22

B251

2.98

Minor intervention

82,777.45

2.23

23

B83

3.88

Medium intervention

 

2.38

 

Yearly summary

Total cost spent: 696,271.83 (11%)

  

Remaining budget: 1,428,254.37 (23%)

Year 5

24

B861

4.16

Major intervention

254,416.0

1.66

25

B860

3.71

Medium intervention

582,257.7

2.21

26

B551

3.74

Medium intervention

175,820.0

2.24

27

B788

3.89

Medium intervention

291,239.04

2.39

28

B320

3.89

Medium intervention

97,676.26

2.39

 

Yearly summary

Total cost spent: 1,401,409 (23%)

  

Remaining budget: 26,845 (0.044%)

 

5-Years summary

Total cost spent: 5973154.6 (99%), Remaining budget: 26845(0.044%)

  

Number of maintained bridges: 28, Avg. condition: 2.27

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