期刊名称：Indian Journal of Computer Science and Engineering
印刷版ISSN：2231-3850
电子版ISSN：0976-5166
出版年度：2017
卷号：8
期号：5
页码：564-570
出版社：Engg Journals Publications
摘要：The idea of this paper is to determine reliability and economic measures of a computer system byproviding software component as spare in cold standby and priority to hardware repair over software upgradation.The hardware and software may fail independently from normal mode. There is a single server who iscalled immediately to conduct hardware repair and software up-gradation as and when required. The repair andup-gradation activities performed by the server are perfect. The random variables associated with time to failure,hardware repair and software up-gradation are statistically independent. The time to hardware and softwarefailures follows negative exponential distribution, whereas the distributions of hardware repair and software upgradationtimes are taken as arbitrary with different probability density functions. The expressions for variousreliability and economic measures are derived in steady state using semi-Markov process and regenerative pointtechnique. The trends of some important measures of system effectiveness have been observed for arbitraryvalues of the parameters and costs. The profit of the present model has also been compared with that of themodel Munday and Malik [2015].
