Comparative Analysis of Two Stochastic Models on Hardware/Software System Considering Various Kinds of Failures, Errors and Recovery Coverages

摘要

The present paper deals with two stochastic Models developed for a single-unit hardware-software system considering occurrence of various kinds of hardware/software failures, hardware/software interactions failures, human errors and common cause failures. The aspects of fault location and fault detection coverages in the system have also been incorporated along with other recovery mechanisms. The fault detection coverage has been considered in the first Model whereas fault location and fault detection coverages have been considered in the second Model. Various measures of system performance are computed and the Models are compared with respect to their reliability and cost considerations. Various conclusions are drawn on the basis of graphical analyses.