Redundancy allocation problem is one of the most important problem in Reliability area. In this problem the reliability and availability of the systems maximized via allocating redundant components to sub-systems. a systems operates normally in its operational mode but fails in either opened or shorted modes. this paper presents a repairable k_out_of_n systems network model with common cause fa...

background: conventional health, safety and environment (hse) are a widely used approach to enhance availability and efficiency of complex systems. the integrated hsee system is defined however as integration of conventional hse with ergonomics approach. the presented hsee system introduces a unique, effective and systemic mechanism, which integrates the structure of the human and organizationa...

Classically, availability refers to the work available in any reversible process that brings about equilibrium between the system and its environment. Here we introduce an additional meaning of availability as the maximum work associated with the change of an external parameter in the Hamiltonian of a quantum system. This availability can be gained in a FEAT process and for times larger than or...

Dynamic update is a mechanism that allows software updates and patches to be applied without loss of service or down-time. Dynamic update of an operating system enables administrators to defer rebooting or restarting services and the resultant disruption, without trading off the ability to apply important security fixes or improve functionality and performance through software updates. We have ...

We present the results of an availability benchmarking study of a three-tier transactionprocessing-oriented database system based on Microsoft SQL Server 2000. Following the general availability benchmarking methodology introduced by our previous work on software RAID systems, we carried out a set of fault-injection experiments in which we measured the effects of 14 different types of realistic...

This paper studies the steady-state availability of systems with times to outages and recoveries that are generally distributed. Availability bounds are derived for systems with limited information about the distributions. Also investigated are the applicability of convenient exponential models in evaluating availability for systems that have two-sided bounded distributions of times to planned ...

The Advanced Automation System is a distributed real-time system under development by Loral's Federal Systems Company for the US Federal Aviation Administration. The system is intended to replace the present en-route and terminal approach US air traac control computer systems. High availability of air traac control services is an essential requirement for the system. This paper discusses the ge...