A novel single composite Shewhart‐EWMA control chart for monitoring the process mean
نویسندگان
چکیده
Statistical process monitoring (SPM) literature recommends the combination of Shewhart and exponentially weighted moving average (EWMA) schemes to improve ability standalone EWMA in detecting small large shifts. The resulting scheme is named combined (or composite) Shewhart-EWMA (CSEWMA) scheme. In this paper, a new single composite (denoted as SCSEWMA) for mean when parameters are known or unknown proposed using an additive model. flexibility made possible by additional weighing parameter that regulates its sensitivity towards shifts different sizes. compared existing Shewhart, CSEWMA X ¯ schemes, results reveal superiority over latter schemes. Simulated real-life data used demonstrate application implementation
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ژورنال
عنوان ژورنال: Quality and Reliability Engineering International
سال: 2021
ISSN: ['0748-8017', '1099-1638']
DOI: https://doi.org/10.1002/qre.3045