- Enhancing the performance of exponentially weighted moving average charts: discussion
- Quality and Reliability Engineering International
- Volume | Issue number
- 31 | 4
- Pages (from-to)
- Document type
- Faculty of Economics and Business (FEB)
- Amsterdam Business School Research Institute (ABS-RI)
Abbas et al. (Abbas N, Riaz M, Does RJMM. Enhancing the performance of EWMA charts. Quality and Reliability Engineering International 2011; 27(6):821-833) proposed the use of signaling schemes with exponentially weighted moving average charts (named as 2/2 and modified − 2/3 schemes) for their improved design structures. A two-sided control structure of these schemes is given in the paper. The computational results in some of the tables of that paper for modified − 2/3 are mistakenly given for the one-sided control structure. The corrected two-sided results are provided here. It is noticed that the superiority of the proposed scheme over the classical exponentially weighted moving average chart remains but is less pronounced.
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