Table 2 Control charts for n1 = 5, n2 = 10, \(\psi\)= 0.15.

From: Adaptive VSS-EWMA control chart for monitoring the process dispersion

Δ

CC

ARL

SDRL

P05

P10

P25

P50

P75

P90

P95

0

FEWMA

1

0

1

1

1

1

1

1

1

VAEWMA

1

0

1

1

1

1

1

1

1

0.25

FEWMA

1.73

0.53

1

1

1

2

2

2

2

VAEWMA

1.99

0.18

2

2

2

2

2

2

2

0.50

FEWMA

4.14

1.74

2

2

3

4

5

6

7

VAEWMA

3.25

0.93

2

2

3

3

4

4

5

0.75

FEWMA

18.16

13.13

4

5

9

15

24

35

44

VAEWMA

10.28

5.66

3

4

6

9

13

18

21

0.90

FEWMA

117.62

112.30

10

17

38

83

162

264

342

VAEWMA

69.42

63.55

8

13

25

50

94

154

195

1.0

FEWMA

370.40

368.85

17

39

104

263

525

873

1119

VAEWMA

370.98

368.74

20

40

103

251

522

870

1141

1.05

FEWMA

190.91

190.54

10

20

56

132

265

439

565

VAEWMA

152.84

148.50

11

19

46

107

212

349

454

1.25

FEWMA

16.49

13.80

2

3

7

13

22

35

44

VAEWMA

11.53

8.13

3

3

6

10

15

22

27

1.50

FEWMA

5.56

4.08

1

1

3

5

7

11

13

VAEWMA

4.49

2.50

2

2

3

4

6

8

9

2

FEWMA

2.28

1.46

1

1

1

2

3

4

5

VAEWMA

2.31

1.04

1

1

2

2

3

4

5

3

FEWMA

1.30

0.60

1

1

1

1

1

2

2

VAEWMA

1.44

0.57

1

1

1

1

2

2

2

Back to article page