A Web-based real-time decision support system, connecting nine plants to a central information server, was implemented at a large oil and gas facility information centre in the Middle East. The case study presented shows how a real-time decision support system improved profitability. The implementation included a full well accounting package, allowing operators, engineers, petroleum engineers, and accountants to direct production and well properties, access test separator results, and reconcile production with the individual well setting. Qatar Petroleum chose Matrikon's ProcessNet as their Web-based decision support system, as it allowed them to retain their existing and proven business processes while enabling these processes through open connectivity, accessibility, and easy usability. By sharing and distributing information between the business processes and providing this information in single views, efficiency was greatly improved.