In this study, we propose a generalized replacement model for a deteriorating system with failures that could only be detected through inspection work. The system is assumed to have two types of failures and is replaced at the Nth type I failure (minor failure) or first type II failure (catastrophic failure) or at the working age T, depending on whichever occurs first. The probability of type I...

Maintenance can be the factor of either increasing or decreasing system's availability, so it is valuable work to evaluate a maintenance policy from cost and availability point of view, simultaneously and according to decision maker's priorities. This study proposes a Partially Observable Markov Decision Process (POMDP) framework for a partially observable and stochastically deteriorating syste...

Our motivation is the problem of determining condition based maintenance policies, for systems whose degradation may be modelled by a continuous time stochastic process. The process is modelled by a Lévy process; failure occurs when the degradation reaches a critical level. The system may be inspected or repaired at any time, and that the costs of inspections and repairs may depend on the of sy...

This work proposes a load allocation decision strategy based on deterioration prognostics information for multi-stack fuel cell systems. The is characterized by the overall resistance value, as it carries key aging of cell. dynamics then modeled an increasing stochastic process whose trend function output power. Combining system and consumption, multi-objective optimization (MOO) decision-makin...

In this paper we prove some stochastic comparisons results for progressive type II censored order statistics. The problem of stochastically comparing concomitants of the two progressive type II censored order statistics with possibly different schemes, under different kinds of dependence between X and Y is considered and it is proved that if Y is stochastically increasing (decreasing) in X, ...

Condition-based maintenance (CBM) is a maintenance strategy that collects and assesses real-time information, and recommends maintenance decisions based on the current condition of the system. In recent decades, research on CBM has been rapidly growing due to the rapid development of computerbased monitoring technologies. Research studies have proven that CBM, if planned properly, can be effect...

Article history: Received 20 February 2009 Accepted 21 April 2010 Available online 27 April 2010