Xuechen Liu1, Majid Khan2, Zahid Rasheed3, Syed Masroor Anwar4,*, Muhammad Arslan5
CMES-Computer Modeling in Engineering & Sciences, Vol.131, No.2, pp. 1171-1195, 2022, DOI:10.32604/cmes.2022.019199
- 14 March 2022
Abstract The EWMA charts are the well-known memory-type charts used for monitoring the small-to-intermediate shifts in
the process parameters (location and/or dispersion). The hybrid EWMA (HEWMA) charts are enhanced version
of the EWMA charts, which effectively monitor the process parameters. This paper aims to develop two new uppersided HEWMA charts for monitoring shifts in process variance, i.e., HEWMA1 and HEWMA2 charts. The design
structures of the proposed HEWMA1 and HEWMA2 charts are based on the concept of integrating the features of
two EWMA charts. The HEWMA1 and HEWMA2 charts plotting statistics are developed using one EWMA… More >
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