The PROMETHEE & GAIAmethods have been implemented in different software for nearly 30 years.
A first implementation was realized at the ULB at the end of the 1980's. It was named PROMCALC and was running under MS-DOS. It was one of the first really interactive software based on outranking methods.
At the end of the 1990's Decision Lab was developed in a joint venture between the ULB and the Canadian company Visual Decision.