In a Non-Linear Dynamic Analysis (NLDA) the determination of the performance level of the structure (PBSA) is of the utmost importance. It would be good to develop some tool to determine if our structure qualifies for a desired level of performance (IO, LS, PC, C) including the intermediate levels. This would allow us not to have to wait for a complete analysis to see the result. With the drift percentages per level and the selected performance, the program determines if the structure is suitable for the selected performance level and allows us the option to continue with the next one. This method must report the elements that do not meet the requirements together with the percentage of failure presented, including the type of force that causes the reported elements to fail.