====== ROADREF Challenge ======

  * 1999: [[https://roadef.org/challenge/1999/en/sujet.php|Inventory management problem]]
  * 2001: [[https://roadef.org/challenge/2001/en/sujet.php|Frequency Assignment Problem with Polarization]]
  * 2003: [[https://roadef.org/challenge/2003/en/sujet.php|Management of the Missions of the Earth Observation Satellites]]
  * 2005: [[https://roadef.org/challenge/2005/en/sujet.php|Car Sequencing problem]]
  * 2007: [[https://roadef.org/challenge/2007/en/sujet.php|Technicians and Interventions Scheduling for Telecommunications]]
  * 2009: [[https://roadef.org/challenge/2009/en/sujet.php|Disruption Management for commercial aviation]]
  * 2010: [[https://roadef.org/challenge/2010/en/sujet.php|A large-scale energy management problem with varied constraints]]
  * 2012: [[https://roadef.org/challenge/2012/en/sujet.php|Machine Reassignment]]
  * 2014: [[https://roadef.org/challenge/2014/en/sujet.php|Trains don't vanish]]
  * 2016: [[https://roadef.org/challenge/2016/en/sujet.php|Inventory Routing Problem]]
  * 2018: [[https://roadef.org/challenge/2018/en/sujet.php|Cutting Optimization Problem]]
  * 2020: [[https://roadef.org/challenge/2020/en/sujet.php|Maitenance planning Problem]]
  * 2022: [[https://roadef.org/challenge/2022/en/sujet.php|3D truck loading optimization problem]]