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Phase I monitoring of simple linear profiles in multistage processes with cascade property

Kalaei, M ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1007/s00170-016-9691-0
  3. Publisher: Springer London , 2018
  4. Abstract:
  5. When a multistage manufacturing process is monitored statistically, the cascade property results in a more complicated condition compared to the case when a single-stage process is controlled. The cascade property usually exists in different stages of a multistage process, where the quality of a stage influences the performance of the next stage. Moreover, sometimes the quality of a product/process is best characterized by a functional relationship. This relationship is referred to as a profile. In this paper, phase I monitoring of simple linear profile is addressed for a multistage process involving the cascade property. To aim this, the capabilities of the methods that may be used to monitor a profile in a multistage process are first assessed. Then, a statistic, named the U statistic, is introduced to provide the opportunity of removing the cascade property. This statistics provides quality engineers a way to reduce the complicated condition of monitoring a multistage process. The new approach also helps quality engineers to diagnose effectively the stage responsible for the out-of-control condition. To evaluate the effectiveness of the proposed approach, different simulated cases are analyzed numerically. In addition, a case study is provided to illustrate the applicability of the proposed method in real-world manufacturing environments. © 2016, Springer-Verlag London
  6. Keywords:
  7. Cascade property ; Manufacture ; Quality control ; Functional relationship ; Manufacturing environments ; Multistage manufacturing process ; Multistage process ; Out-of-control conditions ; Profile monitoring ; Single-stage process ; Test power ; Process control
  8. Source: International Journal of Advanced Manufacturing Technology ; Volume 94, Issue 5-8 , 2018 , Pages 1745-1757 ; 02683768 (ISSN)
  9. URL: https://link.springer.com/article/10.1007%2Fs00170-016-9691-0