A SURVEY OF RECENT DEVELOPMENTS IN THE DESIGN OF ADAPTIVE-CONTROL CHARTS

This survey presents. in a comprehensive way, the substantial recent d evelopments in the statistical and economic design of adaptive or dyna mic charts that allow some of their parameters to change during produc tion. After discussing several different measures of performance for t hese charts, the survey proceeds with a presentation of published mode ls and results, classifying them according to the chart parameters (sa mpling intervals, sample sizes, and control limits) that the models al low to change dynamically. Comparisons between adaptive and static cha rts are provided and discussed. It is concluded that utilization of ad aptive charts can increase significantly the effectiveness of process monitoring. Finally, the survey identifies gaps in the existing litera ture which may constitute fruitful areas for further research.