关键词: 鲁棒参数控制, 休哈特控制图

Abstract: Currently, no existing Statistical Process Control (SPC) techniques could be directly used to monitor the Robust Parameter Control (RPC) application process in which changes in process mean and variance might occur frequently. An alternative design approach of adaptive control charts with variable control lines was presented directly based on RPC application process. This design strategy was quite different from the traditional adaptive control chart design approaches in adjusting variable control parameters via analyzing the location of latest sample points. A new optimization algorithm of variable control lines was designed by estimating the changes of process mean and variance. Through an effective online estimation of process mean and variance, a better performance-tracking on frequently changing process could be expected. A case study was presented to verify the effectiveness and feasibility of this proposed approach.

Key words: robust parameter control, Shewhart control chart, variable control lines