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The exponentially-weighted-moving-average (EWMA) control chart was developed to detect small shifts in mean and variability of a key quality characteristic in a manufacturing process. To improve its performance, several modified statistical schemes on manipulation of random samples of real data (precise numbers) collected from the quality characteristic have been proposed. Among them, the recently...
Statistical process control (SPC) is the method that monitors process quality characteristic. Through control charts, one can detect whether the present process malfunction. However, some annoyances may arise while the engineers need to choose appropriately control chart under different levels of process malfunction. The main objective of this research is using step-by-step procedures to present a...
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