Table 8 TOPSIS separation measures of Al6061 and Al6063.

From: Optimization of drilling parameters for Al6061/Al6063–SiC–ZrO2 composites using TOPSIS considering microstructure and machinability

Sl. No.

Separation measure of positive, negative ideal solutions and relative closeness value Al6061

Separation measure of positive, negative ideal solutions and relative closeness value Al6063

Separation measure of positive ideal solution (S+)

Separation measure of negative ideal solution (S−)

Relative closeness (Ci)

Rank

Separation measure of positive ideal solution (S+)

Separation measure of negative ideal solution (S−)

Relative closeness (Ci)

Rank

1

0.1441

0.0811

0.3602

25

0.1532

0.0741

0.3259

27

2

0.1433

0.0619

0.3016

27

0.1508

0.0897

0.3729

26

3

0.1467

0.0679

0.3165

26

0.1475

0.9503

0.3917

25

4

0.0727

0.1090

0.5998

21

0.0737

0.1285

0.6353

24

5

0.0753

0.1058

0.5842

23

0.0635

0.1273

0.667

20

6

0.0833

0.1089

0.5665

24

0.0691

0.1323

0.6568

23

7

0.0322

0.1439

0.8170

3

0.0345

0.1582

0.8208

2

8

0.0547

0.1373

0.7151

12

0.0488

0.1517

0.7564

11

9

0.0423

0.1388

0.7666

6

0.048

0.1559

0.7645

9

10

0.0730

0.1069

0.5941

22

0.0619

0.1255

0.6697

19

11

0.0610

0.1134

0.6501

17

0.067

0.1315

0.6622

22

12

0.0656

0.1173

0.6413

19

0.0623

0.1342

0.6827

18

13

0.0702

0.1340

0.6563

16

0.0429

0.156

0.7842

6

14

0.0745

0.1338

0.6423

18

0.0652

0.1527

0.7006

16

15

0.0816

0.1305

0.6154

20

0.075

0.1492

0.6653

21

16

0.0477

0.1479

0.7560

7

0.0669

0.1546

0.6977

17

17

0.0411

0.1503

0.7854

5

0.0454

0.1582

0.7769

8

18

0.0595

0.1446

0.7085

13

0.0425

0.1623

0.7922

5

19

0.0622

0.1241

0.6660

15

0.0479

0.143

0.749

12

20

0.0606

0.1282

0.6789

14

0.0393

0.151

0.7931

4

21

0.0507

0.1335

0.7249

10

0.0554

0.1472

0.7263

15

22

0.0228

0.1571

0.8733

1

0.0444

0.1596

0.7822

7

23

0.0337

0.1507

0.8175

2

0.0399

0.1651

0.8051

3

24

0.0386

0.1475

0.7925

4

0.02

0.1693

0.8941

1

25

0.0558

0.1526

0.7322

8

0.0541

0.1719

0.7605

10

26

0.0585

0.1521

0.7221

11

0.0598

0.1693

0.7388

13

27

0.0567

0.1512

0.7271

9

0.0616

0.1729

0.7373

14

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