This summer school is co-organized by ACP and the french constraint programming working group for "Constraints and Operational Research" within the CNRS research group "operational research" (GdR RO). Since 2005, the ACP organizes an international school (Ireland, Canada, Italy, Australia, Poland, Turkey, France). In parallel, the GdR RO also yearly organizes schools on a wide range of research areas covered by the CNRS.