Asian Journal of Applied Sciences1996-3343xxxx-xxxxKnowledgia Review10.3923/ajaps.2012.357.370El-DamceseM.A. HelmyA.N. 6201256This study deals with the reliability characteristics of two different series system configurations with mixed standby (include cold and warm standby) components. The failure rates of the primary and warm standby components are assumed to follow the Weibull distribution. The repair time distribution of each server is exponentially distributed. Moreover, we will derive the mean time-to-failure and the steady-state availability for a special case of a serial system of two primary components, two warm standby components and one cold standby component, when the failure and repair rate are constant.]]>Farnum, N.R. and P. Booth,199746523525Wang, K.H. and C.C. Kuo,200024957967Wang, K.H., W.L. Dong and J.B. Ke,200618313101322Meng, F.C.,19933319871990Srinivasan, S.K. and M.N. Gopalan,197321748754Wang, K.H. and B. D. Sivazlian,198929849860Xie, M., D. Yuan-Shun and K. Poh,2004