Reliability and MTTF analysis of a non repairable parallel redundant complex system under hardware and human failures

This paper deals with Reliability and MTTF analysis of a two-state complex non-repairable system, consisting of two sub-systems A and B arranged in series, incorporating the concept of hardware and human failures. The failure times for the system follow exponential distribution. Laplace transforms of the various state probabilities have been derived and then reliability of the complex system, at any time t, has been computed by inversion process. MTTF has also been evaluated. In the end various graphs have also been plotted so as to explain the practical utility of the model.