Version 74 (modified by dutka, 11 years ago) (diff)

Moved some paragraphs


  • 07-14-2009: Updated the online documentation. See here to download the documentation of the 0.13.1 release July 2009. This new release of the documentation has the following new features.
  • 07-09-2009: API Reference Guide available as inline documentation. See here for details.
  • 07-04-2009: Updated the online documentation. See here to download the documentation of the 0.13.1 release June 2009.

more news...

Welcome to OpenTURNS' website

About OpenTURNS logo

What is OpenTURNS ?

OpenTURNS is an Open source initiative to Treat Uncertainties, Risks’N Statistics in a structured industrial approach.

Since the beginning of 2005, a partnership of three companies has been working on building together a tool designed to perform uncertainty treatment and reliability analyses.

Key characteristics

OpenTURNS is a Unix/Linux software with three main components :

  • a scientific C++ library including an internal data model and algorithms dedicated to the treatment of uncertainties. The main function of that library is giving to specific applications all the functionalities needed to treat uncertainties in studies. Targeted users are all engineers who want to introduce the probabilistic dimension in their so far deterministic studies.
  • an independent application with a graphical user interface. This application was built to become the work environment for the specialist of the treatment of uncertainties. Targeted users are once again industrial practitioners: those who identify the treatment of uncertainties as a full task, which can be spread to multiple engineering domains.
  • a python module with high level operators in the probabilistic and statistical field. The interest of this language is to be both a powerful scientific language (capable of using C++ libraries), and a user friendly interpreted language like Matlab’s one. This python module was designed to make the development of prototypes easier (in order to test new algorithms and methods for example), to become an easy-to-use support for educational works, … This module intends to become a natural environment capable of integrating new developments within the field of uncertainty and sensitivity analysis. The targeted users are here research centres and the academic community.

An overview of all features available in OpenTURNS is given here.

Downloading Open TURNS

Download arrow

For the experienced users willing to directly download a specific version of Open TURNS, jump to SourceForge download area here.

Getting started

After downloading and installing? the OpenTURNS platform, you probably want to read some documentations about OpenTURNS.

You can also do your first steps with OpenTURNS by checking a basic analytical example or by building a wrapper to link OpenTURNS with other tools (Scilab in this example).

If you want a quick start described step-by-step, please see QuickStart page.


You can find much documentation here.


Frequently Asked Questions

Here, you can find some of the most frequently asked questions about OpenTURNS' project.

Mailing lists

You must follow some instructions to subscribe/unsubscribe to these mailing-lists.

  • User general discussions - users@…
  • Bug reports - bugs@…

Bug reporting

If you find a bug in any component of Open TURNS, please tell us.
We intend to distribute a software that behaves the way we (you and I) expect it to do. But before you send a new bug, please read the FAQ.

To help us solve the bugs you may have found, you have to open a new ticket (the link is shown on the top menu bar). But we were so much spammed we had to block anonymous ticket creation. So before you create your ticket you have to tell us for a login account. Here is how to ask for a login account.

After you logged in with your new account, open a new ticket and describe as much as possible the problem. That is, you have to tell us the component involved (or supposed involved), the version of Open TURNS you are using, and the sequence of actions that reproduces the bug. Without those elements, it is very difficult for us to solve it. You can also give us your email address to be informed of the bug resolution process.

But, please, do not enter any milestone. This element is only for us to inform you of the version in which your bug will be solved.
Be honest when you enter a severity. An erroneously critical or blocking bug may disturb us in our way to solve the maximum of problems.

When your ticket is created, you will be able to follow it through its number on one of the ticket reports.


There are many ways to contribute to the OpenTURNS project :

  • Contribute to the OpenTURNS development
  • Help us to write more documentation
  • Use it and help us to catch bugs!

If you want to know more about contributing, check HowToContribute.