Shahed University
On the Monitoring of AR(1) Auto-Correlated Simple Linear Profiles in Multistage Processes
Hamid Esmaeeli | Amirhossein Amiri | Amir Golabzaei
URL :
http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=158679
Date :
2020/10/31
Publish in :
مهندسي صنايع= Advances in Industrial Engineering - نشريه دانشکده فني سابق
Link :
https://aie.ut.ac.ir/article_82627.html
Keywords :
Auto-Correlation; Cascade Property; Phase II; Average Run Length
Abstract :
If the quality of a process is described using a linear functional relationship between the response variable and independent variables, such a relationship is called the profile. Today, with the development of manufacturing technologies, multistage processes have found a special position in manufacturing companies and industries. In the present paper, we consider a multistage process with AR(1) auto-correlated simple linear profile in each stage and address the effect of both auto-correlation and cascade property on the efficiency of common monitoring procedures. To eliminate the effect of auto-correlation, we used a transformation method as a remedial measure at first. Then, an approach based on the U statistic is applied to eliminate the cascade effect. Next, a modified T2 control chart is proposed to monitor the process in the second stage. The performance of the proposed control chart is evaluated in terms of the average run length criterion. The simulation studies show that the proposed control chart perform satisfactorily
Files in this item :
Download
Name :
158679_17630188974.pdf
Size :
754Kb
Format :
PDF
Authors' Home page
Amirhossein Amiri