منابع مشابه
A Control Chart for Monitoring Process Variability
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Control charts are used to identify the presence of assignable cause of variation in the process. Non-parametric control chart is an emerging area of recent development in the theory of SPC. Its main advantage is that it does not require any knowledge about the underlying distribution of the variable. In this paper a non-parametric control chart for controlling variability has been developed. I...
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Since the earliest days of statistical process control, it has been recognized that it is essential to monitor both mean and variability and to trigger an alarm if either characteristic shows sign of a special cause. It is, however, possible to monitor both mean and variance in a single chart responsive to shifts in either. Traditionally, this has been done by using separate X̄ and S or R charts...
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ژورنال
عنوان ژورنال: Computational Statistics
سال: 2008
ISSN: 0943-4062,1613-9658
DOI: 10.1007/s00180-008-0122-z