Mixed-effects model for reliability assessment of dump trucks in heterogeneous operating environment: A case study
Artikel i vetenskaplig tidskrift, 2022

Reliability of mining equipment is influenced by different operational and environmental risk factors. However, in practice, including all relevant factors in reliability analysis is not possible. Ignoring the risk factors leads to unobserved heterogeneity and biased estimation of reliability characteristics. This research proposes a semi-parametric mixed-effects model to assess the simultaneous effects of observed and unobserved risk factors on reliability. Furthermore, the model can be used for investigating inter-cluster dependency and variability. To illustrate the model, a comprehensive case study is presented using data from three mines in Iran. The results show that the model can address the effect of unobserved risk factors. Moreover, it is found that the hazard of dump trucks is significantly associated with operator skill, season and the elevation difference between dumping and loading points.

mining

unobserved risk factor

frailty

mixed-effects model

heterogeneity

maintenance

reliability

Författare

Zeynab Allahkarami

Tarbiat Modares University

Ahmad Reza Sayadi

Tarbiat Modares University

Behzad Ghodrati

Luleå tekniska universitet

Quality and Reliability Engineering International

0748-8017 (ISSN) 1099-1638 (eISSN)

Vol. 38 5

Ämneskategorier (SSIF 2011)

Mineral- och gruvteknik

Maskinteknik

Produktionsteknik, arbetsvetenskap och ergonomi

Naturresursteknik

Tillförlitlighets- och kvalitetsteknik

Farkostteknik

Sannolikhetsteori och statistik

Styrkeområden

Produktion

DOI

10.1002/qre.3079

Mer information

Senast uppdaterat

2024-12-12