the design of generalized likelihood ratio control chart for monitoring the von mises distributed data

‎in this paper‎, ‎a new generalized likelihood ratio (glr) control chart based on sequentially probability ratio test (sprt) is introduced to monitor the directional mean of von mises distribution‎. ‎different window size of past samples are utilized to construct the glr chart statistic‎, ‎and the performance of this chart in detecting a wide range of parameter shift is evaluated‎. ‎a simulation study is carried out to investigate the performance of the proposed control chart in comparison with cumulative sum (cusum) control chart‎. ‎to guide practitioners‎, ‎a real example is provided‎.