Table 1 Efficiency scores and rank of water companies based on CCR-DEA and CSW-DEA models.

From: Benchmarking the performance of water companies for regulatory purposes to improve its sustainability

Water company

DEA-CCR

DEA-CSW

Efficiency score

Rank

Efficiency score

Rank

WC1

1.000

1

0.584

14

WC2

1.000

1

0.295

22

WC3

1.000

1

0.431

17

WC4

1.000

1

0.592

13

WC5

1.000

1

0.593

12

WC6

0.963

6

0.698

7

WC7

0.862

7

0.363

19

WC8

0.849

8

1.000

1

WC9

0.839

9

0.815

3

WC10

0.782

10

0.336

20

WC11

0.753

11

0.963

2

WC12

0.725

12

0.744

5

WC13

0.720

13

0.312

21

WC14

0.715

14

0.393

18

WC15

0.693

15

0.489

16

WC16

0.681

16

0.640

11

WC17

0.648

17

0.763

4

WC18

0.625

18

0.678

8

WC19

0.548

19

0.198

23

WC20

0.514

20

0.492

15

WC21

0.480

21

0.720

6

WC22

0.470

22

0.674

9

WC23

0.323

23

0.650

10

Average

0.747

 

0.584

 

Std. Dev.

0.197

 

0.211

 

Median

0.725

 

0.593

 

Minimum

0.323

 

0.198

 
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