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Measurements with a periodicity are common in practice but there have been no specific monitoring control techniques for them. In this paper, we propose a type of control chart that plots measurements around a circle so that information from the same stage of different cycles can be readily compared. Some basic properties of such charts are investigated, and further developments are discussed. The...
Periodic measurements are very common in practice, with a specific characteristic, periodicity. In this paper, we propose a type of control chart that plots the measurement around a circle. By doing so, information from the same stage of different cycles can be compared easily. Some basic properties are investigated and further developments are discussed. The basic circle chart can also be applied...
In the history of health management, control chart techniques have been applied to monitor different types of systems, e.g. human health, equipment health, or healthcare systems. However, with the development of modern technology, the traditional control charts, which monitor the number or the proportion of events occurring in a certain sampling interval, are facing more and more obstacles for high...
Control charts as one of the most well-known statistical process control (SPC) techniques have shown to be effective in process monitoring. Most of the existing studies in the area of the time-between-event (TBE) control charts have been focused on the univariate cases. In this paper, a MEWMA chart is constructed for monitoring the mean vector of the Gumbel's bivariate exponential TBE model. The average...
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