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A control chart plots measured values along with upper and lower quality control limits. Values appearing outside these limits are unacceptable and could indicate a manufacturing problem. Although ...

The extent to which products meet specifications needs to be systematically monitored in a production process. Product quality will typically be defined by two quantities: deviations from stated ...

Many types of control charts have an ability to detect process changes that can weaken over time depending on the past data observed. This is often referred to as the "inertia problem." We propose a ...

This is a preview. Log in through your library . Abstract THE number of rejections can be reduced or, in many cases, trouble can be spotted in the production process before rejections occur, so that ...

Control charts have been widely used for monitoring production processes and identifying assignable causes of variability. Many papers investigate the application of control charts in different ...

Statistical process control (SPC) charts provide a natural approach to analysing time series data for healthcare quality ...