Age replacement models are fundamental to maintenance theory. This paper summarizes
our new perspectives and hods in age replacement models: First, we optimize the expected …

This article revisits the optimization problems of age-based replacement models for
exponential failure distributions. First, we show the steps how an age replacement time goes …

This paper studies age and periodic replacement policies in general replacement models by
considering major failures and minor failures, meanwhile, random replacement policies are …

This paper proposes a random and age replacement policy for an operating unit which
works at random times. First, the unit is replaced before failure at a planned time T or at the …

Two extended preventive replacement models for systems that execute projects at random
times are discussed in this paper. The system is subject to shocks at which the system …

This paper considers replacement and maintenance policies for an operating unit which
works at random times for jobs. The unit undergoes minimal repairs at failures and is …

In this article, a Bayesian approach is developed for determining an optimal age
replacement policy with minimal repair. By incorporating minimal repair, planned …

In most of literatures of age replacement policy, failures before planned replacement age
can be either minimally repaired or perfectly repaired based on the types of failures, cost for …

The purpose of this paper is to investigate the generalized age maintenance policies for a
system with random working times. When the system fails, it is subject to one of two types of …

It would be of interest to formulate the general replacement models, combing the constant
and random policies to satisfy the commonly planned and randomly needed replacement …