Automated analysis of input materials and adjustments of input material feeders is supporting cement producers in reducing the economic and environmental impact of their operations. By Dr Michael Amrhein and Prof Dr Dominique Bonvin, Online Control Sarl, Switzerland, Dr Mathieu Antoni and Matthias Bürki, Ciments Vigier SA, Switzerland, Rajendra Mishra, Malvern Panalytical BV, The Netherlands, and Dr Murielle Goubard, Malvern Panalytical SAS, France