Now showing items 1-3 of 3

    • Charts With Variable Parameters 

      Costa, Antonio F.B. (1996-06)
      The idea of varying the chart parameters has been explored extensively in recent years. Basically, the value establishes if the control should be relaxed or not. When falls near the target the control is relaxed because ...
    • Charts With Variable Sample Sizes and Sampling Intervals 

      Costa, Antonio F.B. (1995-09)
      Recent theoretical studies have shown that the chart with variable sampling intervals (VSI) and the chart with variable sample sizes (VSS) are quicker than the traditional chart for detecting shifts in a process. This ...
    • Joint X and R Charts with Variable Sample Sizes and Sampling Intervals 

      Costa, Antonio F.B. (1996)
      Recent studies have shown that the chart with variable sampling intervals (VSI) and/or with variable sample sizes(VSS) detects process shifts faster that the traditional chart. This article extends these studies for ...