Walter Carlier and Patrick Groenweghe have a long track record in the OLAP industry working with OLAP products. It started in the late 80's and the early 90's with the Comshare products Commander EIS, System W, One-UP and Prism. In that time Comshare was the leading company in what was called Decision Support Systems (DSS) and Executive Information Systems (EIS).
In the past 30 years Walter and Patrick followed the OLAP evolution closely and worked with products such as Essbase (first from Arbor Software, later Hyperion and finaly Oracle), TM1 (from Applix, later Cognos and IBM) and MPC (from Comshare, later Geac and now Infor). They implemented many OLAP solutions at companies such as Arjo Wiggins, ING, KBC, CFE, Daikin, Danone, Etex Group, Heraeus Electro Nite, Janssen Pharmaceutica, Kraft Foods, Palm Breweries, Provinciebestuur Antwerpen, Sioen, TDK Recording Media Europe and UCB.