Persalys offers the possibility to calculate the reliability of your structures or systems. The goal is to calculate a **probability of failure or a probability of threshold exceedance** of a quantity of interest. To do so, simply define a limit state specifying if the system fails when it is above or below a critical value.

Persalys provides 4 methods:

**Monte Carlo**simulation**FORM or SORM**approximation (*First/Second Order Reliability Method*)**Importance sampling**simulation after the FORM approximation

**importance factors**or the parameters

**sensitivity**from the distribution to the probability are also provided.

For more information on the use of FORM and SORM methods, refer to the following video:

For more information on the use of the Monte Carlo of Importance sampling simulation, refer to the following video: