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Assessing trends in Duane plots using robust fits

Author

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  • García-Escudero, Luis A.
  • Fernández, Miguel A.
  • Duque, Oscar
  • Zorita, Angel

Abstract

The Duane plot is a simple and widely used graphical technique in the analysis of repairable systems. The fitting of a straight line to points in that graph serves to determine the behavior of the system assuming a power law process. However, the classical least squares fitting suffer from lack of robustness and it is specially heavily affected by the more remote and perhaps least interesting points. In order to solve this drawback we propose a robust fit based on Least Median of Squares (LMS) or Least Trimmed Squares (LTS) regression estimators of [1].

Suggested Citation

  • García-Escudero, Luis A. & Fernández, Miguel A. & Duque, Oscar & Zorita, Angel, 2005. "Assessing trends in Duane plots using robust fits," Reliability Engineering and System Safety, Elsevier, vol. 90(1), pages 106-113.
    • Handle: RePEc:eee:reensy:v:90:y:2005:i:1:p:106-113
    DOI: 10.1016/j.ress.2005.03.013
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    Cited by:

    1. Van Dyck, Jozef & Verdonck, Tim, 2014. "Precision of power-law NHPP estimates for multiple systems with known failure rate scaling," Reliability Engineering and System Safety, Elsevier, vol. 126(C), pages 143-152.

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