This paper considers the problem of enhancing the dependability (availability and its in¯uencing factors) of optical cross connect nodes. These nodes are expected to be a crucial part of future optical communication networks. The genetic optimum redundancy allocation (GORA) algorithm proposed here is based on a hybrid genetic algorithm and solves the dependability enhancement problem by optimiz...

This article is an attempt to obtain a compromise allocation of a reliability optimization problem in case of maintenance components and in case of redundancy. In first case, time taken and the cost spent on system maintenance is minimized simultaneously for the required reliability R* (say) and in case second cost, weight and volume of the system is minimized simultaneously for the required re...

In this paper a redundancy allocation problem is studied where for the first time the supplier selection is taken into consideration and redundant components are provided from appropriate suppliers with the most suitable offers such as discount on buying price of components, warranty length for components, things like that, so that the system reliability, profit and the warranty length proposed...

The redundancy allocation is one of the most important and useful problems in system optimization, especially in electrical and mechanical systems. The object of this problem is to maximize system reliability or availability within a minimum operation cost. Many works have been proposed in this area so far to draw the problem near to real-world situations. While in classic models the system com...

This paper presents a new mathematical model for a redundancyallocation problem (RAP) withcold-standby redundancy strategy and multiple component choices.The applications of the proposed model arecommon in electrical power, transformation,telecommunication systems,etc.Manystudies have concentrated onone type of time-to-failure, butin thispaper, two components of time-to-failures which follow hy...

In this paper, we investigate the optimum way to allocate redundancy of finite-length nested codes for modern nonvolatile memories suffering from both permanent defects and transient errors (erasures or random errors). A nested coding approach such as partitioned codes can handle both permanent defects and transient errors by using two parts of redundancy: 1) redundancy to deal with permanent d...

The Redundancy Allocation Problem (RAP) is well-known in the field of reliability optimization. In this paper, RAP investigated assuming that distribution time to failure components has form an Erlang with a time-dependent rate parameter and considering choice redundancy for each subsystem can be none, active, standby or mixed. A genetic algorithm used solve problem optimal allocation. To analy...

In this paper, a tabu search for solving the redundancy allocation problem (RAP) in multi-states (different performance levels) series-parallel systems (MSPS) is proposed. The problem is modeled to find the optimal system configuration that minimizes the cost of the component selection and redundancy level under given minimum required system reliability constraints. The proposed solution method...

SADAN KULTUREL-KONAK1, ALICE E. SMITH2 and DAVID W. COIT3 1Management Information Systems, Penn State Berks-Lehigh Valley College, Tulpehocken Road, P.O. Box 7009, Reading, PA 19610-6009, USA E-mail: [email protected] 2Department of Industrial and Systems Engineering, Auburn University, 207 Dunstan Hall, Auburn, AL 36849, USA E-mail: [email protected] 3Department of Industrial and Systems Engi...