Abstract
The focus of the present study is to develop a reliability model for a cold standby computer system. A computer system is considered as single unit in which hardware and software components works independently together. One more identical unit (computer system) is taken up for spare to protect the functioning of the system as and when required. The failure of the components is independent to each other. A single server, who takes some time to arrive at the system, is called to do repair activities of the system that are hardware repair and software up-gradation. The failure times of h/w and s/w are exponentially distributed while the distributions of repair, replacement and arrival times of the server are taken as arbitrary with different probability density functions (pdf). Various reliability measures are obtained by using semi-Markov process and regenerative point technique. The results for a particular case have also been evaluated to depict the graphical behavior of MTSF, availability and profit of the system model with respect to h/w failure rate for fixed values of other parameters. The findings of the present study will help the system designers in making the reliable systems under some pre specified assumptions of the system models.
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