Table 6 \(AR{L}_{1}\) values for SS and DS-Weibull charts when \(n=35\) and \({r}_{0} = 370\).

From: Optimized two-stage time-truncated control chart for Weibull distribution

Shift f

SS Weibull

DS Weibull

%Gain

\({{\text{ARL}}}_{1}\)

\({\text{WL}}\)

\({{\text{UCL}}}_{1}\)

\({{\text{UCL}}}_{2}\)

\({{\text{n}}}_{1}\)

\({{\text{n}}}_{2}\)

\({\text{ASN}}\)

\({{\text{ARL}}}_{0}\)

\({{\text{ARL}}}_{1}\)

1.00

370.55

5.21

15.96

21.85

12.50

60.32

31.04

369.16

370.88

0.02965

0.9

246.67

8.57

15.20

24.79

12.61

62.48

32.11

375.34

11.85

95.89497

0.8

72.29

6.23

20.38

24.78

12.62

48.34

33.12

387.54

20.42

71.75266

0.7

23.20

7.88

17.18

24.00

12.82

49.72

30.77

383.15

8.85

61.85345

0.6

16.58

2.42

12.91

13.81

12.51

56.82

31.19

372.24

6.68

59.71049

0.5

12.46

8.43

12.99

16.38

12.80

24.63

32.50

383.15

2.52

79.77528

0.4

1.128

12.21

25.23

25.42

12.54

59.84

33.55

449.81

1.02

9.574468

0.3

1.11

6.89

12.71

20.06

12.96

56.86

31.25

450.89

1.0066

9.315315

0.2

1.10

6.52

15.93

16.38

12.57

25.17

34.17

420.48

1.002

8.909091

0.1

1.00

0.54

15.54

28.26

12.54

54.62

34.76

403.99

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