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The combined Shewhart–EWMA sign charts
Quality and Reliability Engineering InternationalAbstractThe Shewhart control chart is a prominent tool for identifying the changes in process parameters that are of large magnitude, however, it has reduced ability to identify the process changes of small magnitudes. On the other hand, an exponentially weighted moving average (EWMA) control chart is superior to the Shewhart chart in identifying ...
Mohammed Kadhim Shanshool +3 more
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Design Considerations and Trade-offs for Shewhart Control Charts
2021When in-control parameters are unknown, they have to be estimated using a reference sample. The control chart performance in Phase II, which is generally measured in terms of the Average Run Length (ARL) or False Alarm Rate (FAR), will vary across practitioners due to the use of different reference samples in Phase I. This variation is especially large
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Planning time-between-events Shewhart control charts
Total Quality Management, 1998Shewhart charts for counts are widely used in statistical process control. Usually, they are designed with, as observation to be monitored, the number or the proportion of counts occurring in sampl...
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Combined cumulative sum and shewhart variance charts
Journal of Statistical Computation and Simulation, 1989The process variance is usually assumed to be a constant for a control chart for the process mean. However, both changes in the process mean and process variance ought to be regarded as indications that the process is out of control. A combined cumulative sum (CUSUM) chart and Shewhart variance chart provides simultaneous control of the process mean ...
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Integrative oncology: Addressing the global challenges of cancer prevention and treatment
Ca-A Cancer Journal for Clinicians, 2022Jun J Mao,, Msce +2 more
exaly
The combined Shewhart-CUSUM sign charts
Communications in Statistics - Simulation and Computation, 2021Dadasaheb G. Godase +1 more
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Multidisciplinary standards of care and recent progress in pancreatic ductal adenocarcinoma
Ca-A Cancer Journal for Clinicians, 2020Aaron J Grossberg +2 more
exaly

