This course is led by Eric-Hans Wolff, a seasoned refinery professional with over 30 years of experience in oil refining, production optimisation, and performance improvement. Throughout his career, Eric-Hans has held key roles in operations, technical services, and performance management, giving him deep insight into the practical challenges of maintaining accurate hydrocarbon mass balances. He has led numerous site-wide initiatives focused on loss reduction, measurement reconciliation, and plant performance improvement, and brings a clear, structured approach to solving complex balance issues. In this course, Eric-Hans shares not only technical knowledge but also real-world case studies and lessons learned from decades in the field, helping participants connect theory with day-to-day operational realities.