The calculation allows to analyze and predict probability of events selecting an underlying distribution function: Exponential, Weibull, Normal or Log-Normal. Two methods are provided: Maximum Likelihood and Rank Regression method. If the Rank Regression method is selected, the observed event times are converted to the corresponding probability values first. For this purpose the following models can be selected by user: Benard, Hazen and Mean. The confidence bounds can also be calculated using the Fisher Matrix or the Likelihood Ratio method.