Previous editions
- June, 1994: University of Portsmouth, United Kingdom.
- May, 1996: University of Malaga, in Torremolinos, Spain.
- May-June, 1998: Université Laval, Quebec City, Canada.
- May-June, 2000: University of Economics in Katowice, Beskidy Mountains, Poland.
- June, 2002: Nara, Japan.
- April, 2004: University of Tunis in Hammamet, Tunisia.
- June, 2006: the EURO Loire Valley, City of Tours, France
- September, 2008: University of Portsmouth, United Kingdom
- May, 2010: University of Sfax, Tunisia.
- June, 2012: the Canadian Operational Research Society, city of Niagara Falls, Canada
- December,2015: Tlemcen University, Algeria
- October, 2017: Metz, France
- October 2019: Marrakech, Morocco