Time and magnitude monitoring using Weibull based Max-EWMA chart

To monitor time and magnitude, different types of control charts have been proposed in the literature. This article proposes a new maximum exponentially weighted moving average (Max-EWMA) chart by assuming Weibull distribution. The test-statistic Max-EWMA consists two EWMA statistics, where one statistic is used for monitoring magnitude while other to interval between events. performances assessed on basis run length characteristics like, (ARL), standard deviation (SDRL), quantiles Besides extensive simulation studies, real data sets are also considered show applications chart. results that efficient detecting size small shifts.