Research Article
Exponentially Weighted Moving Average Control Charts for the Process Mean Using Exponential Ratio Type Estimator
Table 2
ARLs for proposed repetitive EWMA-RSS control chart using Bahl and Tuteja (1991) exponential ratio-type estimator, when
is 500.
| shift | = 3.0958, = 2.339, λ = 0.2 |
| f | = 0.25 | = 0.50 | = 0.90 |
| 0 | 500.62 | 500.62 | 500.62 |
| 0.01 | 464.17 | 456.48 | 400.22 |
| 0.02 | 372.17 | 352.05 | 237.32 |
| 0.03 | 274.82 | 248.83 | 130.27 |
| 0.04 | 195.57 | 170.11 | 72.01 |
| 0.05 | 137.70 | 115.66 | 40.96 |
| 0.10 | 26.49 | 19.71 | 4.15 |
| 0.15 | 6.78 | 4.81 | 1.31 |
| 0.20 | 2.48 | 1.87 | 1.02 |
| 0.25 | 1.39 | 1.19 | 1.00 |
| 0.30 | 1.09 | 1.04 | 1.00 |
| 0.35 | 1.02 | 1.00 | 1.00 |
| 0.40 | 1.00 | 1.00 | 1.00 |
| 0.5 | 1.00 | 1.00 | 1.00 |
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