| Full text | |
| Author(s): |
Morita, Lia H. M.
[1]
;
Tomazella, Vera L.
[2]
;
Balakrishnan, Narayanaswamy
[3]
;
Ramos, Pedro L.
[4]
;
Ferreira, Paulo H.
[4]
;
Louzada, Francisco
[4]
Total Authors: 6
|
| Affiliation: | [1] Univ Fed Mato Grosso, Dept Stat, Cuiaba, Mato Grosso - Brazil
[2] Univ Fed Sao Carlos, Dept Stat, Sao Carlos, SP - Brazil
[3] McMaster Univ, Dept Math & Stat, Hamilton, ON - Canada
[4] Univ Sao Paulo, Inst Math & Comp Sci, Sao Carlos, SP - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL; v. 37, n. 2, p. 763-784, MAR 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Traditional reliability analysis techniques focus on the occurrence of failures over time. Nevertheless, in certain cases where the occurrence of failures is tiny or almost null, the estimation of the quantities that describe the failure process is compromised. In this context, we introduce a reliability model for systems adopting the degradation process using frailty. The evolved degradation model has as experimental data, not the failure, but a quality feature attached to it. Degradation analysis can provide information about the lifetime distribution components without actually observing failures. In this paper, we propose an inverse Gaussian process model with frailty as a possible tool to investigate the effect of unobserved covariates. Moreover, a comparative study with the classical inverse Gaussian process based on simulated data was performed, revealing that the asymptotic properties of the maximum likelihood estimators are compromised when the presence of frailty is ignored. The application was based on two real data sets in the literature, showing that the inverse Gaussian process frailty models are propitious to use; however, gamma and inverse Gaussian distributions for frailty present similar results. (AU) | |
| FAPESP's process: | 17/25971-0 - Statistical inference of complex systems |
| Grantee: | Pedro Luiz Ramos |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 13/07375-0 - CeMEAI - Center for Mathematical Sciences Applied to Industry |
| Grantee: | Francisco Louzada Neto |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |