This paper discusses step-stress partially accelerated life test under progressive type-II censoring with random removals. The removals from the test are assumed to have binomial distributions. The lifetimes of the test units are considered to be exponential distributed. The maximum likelihood procedure is followed to estimate the unknown parameters of the model. Optimum test plan is developed ...

In this paper, the well-known proportional hazards model which includes several well-known lifetime distributions such as exponential,Pareto, Lomax, Burr type XII, and so on is considered. With both Bayesian and non-Bayesian approaches , we consider the estimation of parameters of interest based on progressively Type-II right censored samples. The Bayes estimates are obtained based on symmetric...

Abstract The researchers, engineers, and physical experimenters may face difficulty to get a distribution that fits the failure data arising from certain systems. So, in this paper, new is introduced, named Poisson–logarithmic half-logistic distribution, based on parallel–series system’s times. Specific statistical properties are investigated for introduced distribution. Also, two real sets con...

Studying the ages of mobile phones is considered one most important things in recent period field shopping and modern technology. In this paper, we will consider that these follow a gamma distribution under progressive first-failure (PFF) censoring. All unknown parameters, as well Shannon Rényi entropies, were estimated for distribution. The maximum likelihood (ML) approach was utilized to gene...

In the context of (multi-center) clinical trials and life testing problems, a general model incorporating both the staggering entry and random withdrawal and pertaining to a simple regression problem (including the two-sample location problem as a special case) is conceived, and, within this framework, a scheme allowing progressive censoring (continuous monitoring of experimentation from the be...