Phase-II monitoring of AR(1) auto-correlated simple linear profiles in multi-stage processes (case study: tyre production industry)
by Amir Golabzaei; Hamid Esmaili; Amirhossein Amiri
International Journal of Productivity and Quality Management (IJPQM), Vol. 41, No. 4, 2024

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.

Online publication date: Mon, 08-Apr-2024

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