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

0500.62500.62500.62

0.01464.17456.48400.22

0.02372.17352.05237.32

0.03274.82248.83130.27

0.04195.57170.1172.01

0.05137.70115.6640.96

0.1026.4919.714.15

0.156.784.811.31

0.202.481.871.02

0.251.391.191.00

0.301.091.041.00

0.351.021.001.00

0.401.001.001.00

0.51.001.001.00