Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2008.4166.4172PeiraviA.DehqanmongabadiN.122008822In empirical engineering projects on reliability testing,
replacement strategy, spares for repair and reliability growth, the Mean
Residual Life (MRL) function may be more relevant than the hazard function
or failure time distribution function, although they are mathematically
equivalent. However, for modeling purposes, MRL and the hazard functions
play somewhat different roles. The MRL summarizes the entire residual
life distribution of time t and the hazard function only relates to the
risk of immediate failure at time t. When the main concern is the risk
of immediate failure, the Proportional Hazards (PH) model has proved to
be an extremely useful model. Yet, it may not be the most appropriate
model when one is concerned with the remaining lifetime of an individual
part at time t as in replacement and repair models. In this study,
a new accelerated life testing model based on the Proportional MRL (PMRL)
model in the presence of more than one failure mode is presented and its
applicability in empirical reliability engineering is shown. The model
can provide accurate reliability estimates for multiple failure modes
problems and is a useful alternative to the Accelerated Failure Time (AFT)
and the PH models. In some cases, our model is even better than the PH
model.]]>Balasooriya, U. and C.K. Low,2004Chen, Y.Q., N.P. Jewell, X. Lei and S. Cheng, 2005Cox, D.R.,1972Elsayed, E.A. and L. Haitao and W. Xindong, 2006Gupta, R.C. and S.N.U.A. Kirmani,1998Kalbfleisch, J.D. and R.L. Prentice,2002Kundu, D. and A.M. Sarhan,2006Oakes, D. and T. Dasu,1990Park, C.,2005Pascual F., 2007Pham, H.,2003Sarhan, A.M.,2007Zhang, H. and E.A. Elsayed,2006Zhao, W. and E.A. Elsayed,2005Zhao, W. and E.A. Elsayed,2005