Abstract

JOSE, Joby K.  and  DRISYA, Mottammal. Stress-Strength Reliability Estimation of Time-Dependent Models with Fixed Stress and Phase Type Strength Distribution. Rev.Colomb.Estad. [online]. 2021, vol.44, n.1, pp.201-223.  Epub Feb 27, 2021. ISSN 0120-1751.  https://doi.org/10.15446/rce.v44n1.86519.

The time-dependent stress-strength reliability models deal with systems whose strength or the stress imposed on it or both are time-dependent. In this paper, we consider time-dependent stress-strength reliability model which is subjected to constant stress and it causes a change in the strength of the system over each run of the system. Assuming a continuous phase-type distribution for the initial strength and exponential distribution for the duration of each run of the system called cycle time we derived the expression for the stress-strength reliability of the system at time t. The model is further extended to the cases where cycle time distribution is Gamma and Weibull. Simulation studies are conducted to assess the variations in stress-strength reliability, R(t) at different time points, corresponding to the changes in the initial strength distribution and cycle time distribution.

Keywords : EM algorithm; Exponential distribution; Gamma distribution; Phase type distribution; Stress-Strength reliability; Weibull distribution.

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