Thanks for your interest in Beta Index (BI) software. BI is a new computer program that includes the classical methods, the novel time-dependent, and the time-independent reliability analysis techniques in its architecture. Moreover, there is no limitation in the software to express modeling uncertainties by random variables. In other words, it covers reliability problems included structural models with multiple complexities and an implicit or explicit limit state function considering the correlation between random variables. BI is developed by object-oriented Python programming language and its user interface is prepared using PyQT library. For more information, see the Examples, HELP, and EULA pages.