This paper represents the reliability analysis of different operating
system models i.e. computer, computer based communication network and
solar energy systems. All of these models are based on some specific s
et of assumptions. Failure time distributions are assumed to be negati
ve exponential white the repair, replacement and recovery time distrib
utions are followed to be general for proposed system models. Using re
generative point technique several important cost effective reliabilit
y characteristics are obtained. To gain the high reliability targets g
raphical representations are also provided.