Asymmetric Tukey’s Control Chart Robust to Skew and Non-Skew Process Observation
نویسنده
چکیده
In reality, the process observations are away from the assumption that are normal distributed. The observations could be skew distributions which should use an asymmetric chart rather than symmetric chart. Consequently, this research aim to study the robustness of the asymmetric Tukey’s control chart for skew and non-skew distributions as Lognormal and Laplace distributions. Furthermore, the performances in detecting of a change in parameter of asymmetric and symmetric Tukey’s control charts are compared by Average ARL (AARL). The results found that the asymmetric performs better than symmetric Tukey’s control chart for both cases of skew and non-skew process observation. Keywords—Asymmetric control limit, average of average run length, Tukey’s control chart and skew distributions.
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