| Abstract: | In this study, four redundant systems having the parallel string configuration and the quad configuration consisting of 2n identical units are considered and the reliability of each system and MTBF (Mean Time Between Failures) are evaluated. Next, as the special case of the systems in this study, the case of four units corresponds to the Keene's system and MTBF of each system agreed with his results. Further, as the results evaluated MTBF relating to each system consisting of 6, 8 and 10 units, the large and small relations of the MTBF between systems are made clear. |
