Title: Phase-II monitoring of AR(1) auto-correlated simple linear profiles in multi-stage processes (case study: tyre production industry)

Authors: Amir Golabzaei; Hamid Esmaili; Amirhossein Amiri

Addresses: Department of Industrial Engineering, Islamic Azad University, North Tehran Branch, Tehran, Iran ' Department of Industrial Engineering, Islamic Azad University, North Tehran Branch, Tehran, Iran ' Department of Industrial Engineering, Faculty of Engineering, Shahed University, Tehran, Iran

Abstract: Today, with advances in information and manufacturing technologies, multi-stage processes have found a special position in manufacturing companies and industries. Hence in this paper, a multi-stage process with AR(1) auto-correlated simple linear profile (SLP) in each stage is investigated and the impact of both auto-correlation and cascade property on the performance of common monitoring procedures is addressed. Moreover, an MEWMA control chart is proposed to monitor the process in the second stage. The performance of the proposed control chart is evaluated in terms of average run length criterion. The results show that the proposed control chart performs satisfactorily. Finally, the application of the proposed control chart is illustrated using a real case study in the tyre production industry.

Keywords: auto-correlation; cascade property; profile monitoring; multi-stage processes; phase-II; average run length; ARL; tyre production industry.

DOI: 10.1504/IJPQM.2024.137885

International Journal of Productivity and Quality Management, 2024 Vol.41 No.4, pp.484 - 509

Received: 28 Jul 2021
Accepted: 07 Apr 2022
Published online: 08 Apr 2024 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article