Feseniuk A. Methods and tools for improving the accuracy of reliability estimation of fault-tolerant multiprocessors systems

The dissertation is devoted to improve the accuracy of estimating the reliability of fault-tolerant multiprocessor systems (FTMS) by modifying the method of statistical experiments, taking into account the characteristics of the FTMS. A modifications of the method of statistical experiments has been proposed that focused on such features of FTMS as: a significant number of elements, different types of redundancy, a complex procedure of reconfiguration, the hierarchical structure of the system. A method for calculating the reliability of hierarchical FTMS with elements in common has been proposed. The method allows to conduct statistical experiments independently for each subsystem that makes it possible to significantly reduce the total time of calculating the reliability of hierarchical FTMS. The analytical and statistical estimators for the various type of the error of calculation the reliability of FTMS has been proposed. That allows to define the total error of calculating the reliability of the FTMS. Conditions are formulated that allows for the specified FTMS to determine the modification of the method of statistical experiments having the smallest error before the statistical experiments executing.