Table 3 The impact of uncertainty budget on the ESF location-allocation scheme.

From: A two-stage robust optimization model for emergency service facilities location-allocation problem under demand uncertainty and sustainable development

\(\Gamma\)

CPU time(s)

Iter.

Gap

Facility location strategy

Demand satisfaction rate

1

3.10

2

0.00

[1,2,3,5,6,7]

6

99.99%

2

3.09

2

0.00

[1,2,4,6,7,9]

6

99.58%

3

3.12

2

0.00

[1,3,4,5,8,9,10]

7

100.00%

4

3.09

2

0.00

[1,3,4,5,8,9,10]

7

100.00%

5

3.12

2

0.00

[1,3,4,5,8,9,10]

7

100.00%

6

3.12

2

0.00

[1,3,4,5,8,9,10]

7

100.00%

7

3.11

2

0.00

[1,3,4,5,8,9,10]

7

100.00%

8

3.21

2

0.00

[1,3,4,5,7,8,10]

7

100.00%

9

3.18

2

0.00

[3,4,6,7,8,9,10]

7

100.00%

10

3.11

2

0.00

[1,3,4,6,7,9,10]

7

100.00%

11

3.42

2

0.00

[2,3,4,5,6,7,8]

7

100.00%

12

3.15

2

0.00

[1,2,3,4,6,7,10]

7

100.00%

13

3.16

2

0.00

[1,2,3,4,6,7,9]

7

99.67%