Within the class of non-homogeneous Poisson process (NHPP) models and as a result of the simplicity of the mathematical computations of the Power Law Process (PLP) model and the attractive physical explanation of its parameters, this model has found considerable attention in repairable systems literature. In this article, we conduct the investigation of new estimation approach, the regression e...

The aim of this work is to generalize reliability equivalence technique to apply it to a general series-parallel system consists of n subsystems connected in series, and each subsystem i has i m components connected in parallel system, with mixing life time and delayed time. We derive the reliability and mean time to failure of the original and improved systems according to reduction, hot dupli...

Abstract: This paper presents reliability and availability analyses of a model representing a system having one robot and n-redundant safety units with common-cause failures. At least k safety units must function successfully for the robot system success. The robot and other failure rates and the partially failed system repair rates are assumed constant and the failed robot-safety system repair...

The effect of supervisory control on a redundant database unit representing a command and control (C2) system that supports air operations is investigated through simulation. Several supervisory control policies are considered. They authorize restoration and/or routing upon the failure of a server in the system. The performance of the modeled system under these policies is evaluated based on th...

The mean time to failure (MTTF) of a Markovian system can be expressed as a ratio of two expectations. For highly reliable Markovian systems, the resulting ratio formula consists of one expectation that cannot be estimated with bounded relative error when using standard simulation, while the other, which we call a non-rare expectation, can be estimated with bounded relative error. We show that ...

This paper presents the reliability studies of fault-tolerant Zeta Networks (ZTNs): a MIN, designed specially for an irregular class of hybrid networks. The reliability of ZTNs under Dynamic Full Access (DFA) is studied. The metrics used are mean time to failure (MTTF) and cost-effectiveness. Studies of tight Upper Bound (UB) and Lower Bound (LB) of the MTTF shows that ZTNs are more reliable an...

In the manufacturing industry the provision of smart services is an opportunity to gain a competitive advantage. As there are high demands on machine availability, smart services in the field of installed base management are important. Through integrating condition monitoring data with installed base data a digital twin of the installed base can be created. This enables comprehensive analyses a...

We investigate the processes that influence residence time in a partially mixed estuary using a threedimensional circulation model. The complex geometry of the study region is not optimal for a structured grid model and so we developed a new method of grid connectivity. This involves a novel approach that allows an unlimited number of individual grids to be combined in an efficient manner to pr...