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Table 4 Ranking with regard to human risk based on Chen’s method

From: A hybrid fuzzy stochastic analytical hierarchy process (FSAHP) approach for evaluating ballast water treatment technologies

Treatment technology

Rank

1

2

3

4

5

Heat

1000

0

0

0

0

UV

0

2

20

277

701

Ozone

0

929

57

11

3

Ultrasound

0

64

752

180

4

Biocide

0

5

171

532

292

Total

1000

1000

1000

1000

1000