As a complete cement plant supplier, as well as in the single machine business, like grinding mills, the design criteria for permanent operation is of crucial importance. The fundamental basics are well known, and converted into a technical solution, available in the portfolio. Decades of experience, constructive solutions, as well as the use of modern simulation tools and the implementing of a higher level of digitaliza-tion in the production process leads, as is well known, to an increased availability. The planned stoppages for mill maintenance work needs to be kept to a minimum, mechanical simplification is the first step. Detection and assessment of the downtime reasons is a continuous process. Any downtime must be avoided. An analysis and implementation of the performance findings in the design process is essential. © 2021 Verlag Bau und Technik GmbH. All rights reserved.