Jean-Philippe Vial received the prize at the Informs Meeting in Charlotte (nov. 2011). He shares it with Pr. C. Roos. 

The Khachiyan Prize of the INFORMS Optimization Society was established in 2010 and is awarded annually at the INFORMS Fall National Meeting to an individual or a team for life-time achievements in the area of optimization. The award recognizes a sustained career of scholarship from nominees who are still active at the year of the nomination. The prize serves as an esteemed recognition of innovativeness and impact in the area of optimization, including theory and applications.