Statistical Process Control on Time Delay feedback Adjustment Process

摘要

Control chart can be designed to quickly detect small shifts in the mean of a sequence of independent normal observations. But this chart cannot perform well for auto-correlated process. The main goal of this article is to suggest a control chart method using to monitoring process with different time delay feedback controlled processes. A quality control model based on delay feedback controlled processes is set up. And the calculating method of average run length of control charts based on process output and control action of multiple steps delay MME feedback controlled processes is provided to evaluate control charts performance. A simple example is used to illustrate the procedure of this approach.