# \#reliability **URL:** https://openturns.discourse.group/tag/reliability/19.md [Latest](https://openturns.discourse.group/latest.md) · [Categories](https://openturns.discourse.group/categories.md) · [Tags](https://openturns.discourse.group/tags.md) --- ## [Convergence of FORM analysis](https://openturns.discourse.group/t/convergence-of-form-analysis/419)
**Author:** [@EZancato](https://openturns.discourse.group/u/EZancato)\ **Replies:** 1\ **Last updated:** [November 5, 2025, 7:57pm UTC](https://openturns.discourse.group/t/convergence-of-form-analysis/419 "2025-11-05T19:57:23Z")
Hi everyone! I am new to this forum, but I hope someone has some ideas about my current problem. I am a PhD student working on reliability assessment of deteriorating structures. Sadly I cannot (at least yet) share my en… --- ## [Improving the FORM example](https://openturns.discourse.group/t/improving-the-form-example/97)
**Author:** [@josephmure](https://openturns.discourse.group/u/josephmure)\ **Replies:** 0\ **Last updated:** [February 17, 2021, 7:17pm UTC](https://openturns.discourse.group/t/improving-the-form-example/97 "2021-02-17T19:17:39Z")
There is an interesting methodological discussion going on over at GitHub: @MichaelBaudin and @regislebrun wrote interesting contributions that can be read more easily below thanks to Discourse’s LaTeX support. First… --- ## [Why does the LHS class exist?](https://openturns.discourse.group/t/why-does-the-lhs-class-exist/309)
**Author:** [@MichaelBaudin](https://openturns.discourse.group/u/MichaelBaudin)\ **Replies:** 8\ **Last updated:** [November 20, 2023, 10:59am UTC](https://openturns.discourse.group/t/why-does-the-lhs-class-exist/309 "2023-11-20T10:59:01Z")
Hi ! The LHS class estimates a probability using a Latin Hypercube Design. On the other hand, the ProbabilitySimulationAlgorithm can use a Latin Hypercube Design to estimate a probability, but can use other WeightedExp… --- ## [SubsetSampling intermediary quantiles estimation](https://openturns.discourse.group/t/subsetsampling-intermediary-quantiles-estimation/264)
**Author:** [@efekhari27](https://openturns.discourse.group/u/efekhari27)\ **Replies:** 4\ **Last updated:** [October 30, 2023, 3:16pm UTC](https://openturns.discourse.group/t/subsetsampling-intermediary-quantiles-estimation/264 "2023-10-30T15:16:30Z")
Hi everyone, I recently started using the OpenTURNS implementation of the Subset sampling algorithm to estimate rare event probabilities. As described in the documentation example, I tried to isolate the different subse… --- ## [Provide directly the isoprobabilistic transformation during FORM](https://openturns.discourse.group/t/provide-directly-the-isoprobabilistic-transformation-during-form/271)
**Author:** [@Alexis](https://openturns.discourse.group/u/Alexis)\ **Replies:** 2\ **Last updated:** [February 23, 2023, 3:03pm UTC](https://openturns.discourse.group/t/provide-directly-the-isoprobabilistic-transformation-during-form/271 "2023-02-23T15:03:16Z")
Hi, Is it possible to directly provide the isoprobabilistic transformation using FORM instead of defining the distribution and letting Openturns estimates the isoprobabilistic transformation? Thanks, Alexis --- ## [Several limit state functions](https://openturns.discourse.group/t/several-limit-state-functions/186)
**Author:** [@lucelorr](https://openturns.discourse.group/u/lucelorr)\ **Replies:** 1\ **Last updated:** [March 4, 2022, 3:56pm UTC](https://openturns.discourse.group/t/several-limit-state-functions/186 "2022-03-04T15:56:54Z")
Hi, all Is it posible to call several limit state functions with the same input vectors? I would like to connect OpenTURNS with OpenSeesPy. I think that it is easy and I can do it how it were a Python function. Thanks … --- ## [Question on identical event probabilities returned by repeated MonteCarloExperiment](https://openturns.discourse.group/t/question-on-identical-event-probabilities-returned-by-repeated-montecarloexperiment/160)
**Author:** [@Aorus42](https://openturns.discourse.group/u/Aorus42)\ **Replies:** 2\ **Last updated:** [October 4, 2021, 11:39am UTC](https://openturns.discourse.group/t/question-on-identical-event-probabilities-returned-by-repeated-montecarloexperiment/160 "2021-10-04T11:39:09Z")
Hi, I am running probability of failure calculations using a ThresholdEvent and MonteCarloExperiment, set to take a total of 1e7 Monte Carlo samples (specified by 5e5 iterations and 20 samples per iteration). The Monte … --- ## [SORM vs PythonFunction](https://openturns.discourse.group/t/sorm-vs-pythonfunction/88)
**Author:** [@dmitrygrigoryev](https://openturns.discourse.group/u/dmitrygrigoryev)\ **Replies:** 9\ **Last updated:** [March 21, 2021, 5:29pm UTC](https://openturns.discourse.group/t/sorm-vs-pythonfunction/88 "2021-03-21T17:29:04Z")
Hi all, Few months ago a had a questions about difference between PythonFunction and SymbolicFunction behavior in SORM method - https://github.com/openturns/openturns/issues/1637. The general Idea supposed by @regislebr… --- ## [Simulation sensitivity analysis with Importance Sampling](https://openturns.discourse.group/t/simulation-sensitivity-analysis-with-importance-sampling/102)
**Author:** [@dumas](https://openturns.discourse.group/u/dumas)\ **Replies:** 0\ **Last updated:** [February 26, 2021, 5:33pm UTC](https://openturns.discourse.group/t/simulation-sensitivity-analysis-with-importance-sampling/102 "2021-02-26T17:33:02Z")
Hi, I recently needed to compute the sensitivity indices of the probability of failure and I used the SimulationSensitivityAnalysis class. However I think this does not work properly if I perform a simulation with weigh…