Modifying simple linear profiles monitoring schemes in phase II to detect decreasing step shifts and drifts

  • Amirhossein Amiri
  • Marzieh Mehrjoo
  • Zbigniew J. Pasek
ORIGINAL ARTICLE

DOI: 10.1007/s00170-012-4103-6

Cite this article as:
Amiri, A., Mehrjoo, M. & Pasek, Z.J. Int J Adv Manuf Technol (2013) 64: 1323. doi:10.1007/s00170-012-4103-6

Abstract

In profile monitoring, a relationship between a response variable and one or more explanatory variables is monitored. Different methods were developed for phase II monitoring of simple linear profiles. While some of the methods can be used to detect both increasing and decreasing shifts in the regression parameters, others need to be modified to enable detection of decreasing shifts in a process. In this paper, necessary modifications of the phase II methods for simple linear profile monitoring are proposed to improve their performance in detecting decreasing shifts. The paper also presents a performance comparison of several phase II methods.

Keywords

Average run length Statistical process control Profile monitoring Phase II Step shift Drift 

Copyright information

© Springer-Verlag London Limited 2012

Authors and Affiliations

  • Amirhossein Amiri
    • 1
  • Marzieh Mehrjoo
    • 2
  • Zbigniew J. Pasek
    • 2
  1. 1.Industrial Engineering DepartmentFaculty of Engineering, Shahed UniversityTehranIran
  2. 2.Department of Industrial and Manufacturing Systems EngineeringUniversity of WindsorWindsorCanada