Success stories

In this section, the ACP collects success stories of using constraint based technology. We aim to make these stories appeal to a wide audience, so they are written for a general audience.
This section was started in September 2015. We will update it regularly, so make sure to come back regularly!
If you want to share your story (or know someone who has a story to share), please contact us by email at

CP Has Landed on the Comet

Philae Instruments, image copyright ESA/AOES Medialab
On June 13th 2015, the robot-lab Philae woke up on the comet 67P/Churyumov-Gerasimenko to resume a series of experiments interrupted seven months ago. These experiments were scheduled using Constraint Programming, and researchers of the team ROC of the LAAS-CNRS lab developed propagation algorithms to help the Scientific Operations and Navigation Centre (SONC) to efficiently achieve this task.
Gilles Simonin, Christian Artigues, Emmanuel Hebrard, Pierre Lopez and Pauline Ballereau, of the Operations Research & Constraints group (ROC).

Flow-Machines: CP techniques to model style in music and text

Creativity and innovation are the new motto of the modern world. We are constantly exhorted to be creative, to think out of the box, to push our limits. Flow machines (funded by the European Research Council (ERC) and coordinated by François Pachet) are content creation software aiming at enhancing individual creativity.
François PACHET, Sony CSL-Paris and LIP6/UPMC.