This work has for objective to structure a software applied the analysis of the reliability of mechanical components. Starting from the results of tests of failures, or temporary experiments, the program calculates the reliability functions, starting from different statistical distributions. Such distributions are appropriate for different analysis types. A more complete study was made for the Distribution of Weibull, that is the classic model for reliability analysis. The statistical theory is involved in this analysis. Graphic exits that allow a better visualization and understanding of the project conditions are presented together with the reliability functions. This work turns more accessible the concepts related to the theory of the reliability of components and systems, facilitating larger understanding and familiarity.