Abstract-This paper describes how to use the OEE index toanalyze the reliability and efficiency of the production line. The survey provides an indication of machines that generate disturbances in the operation of the system and is based on the three parameters: availability, performance and quality. In the present study, the operation of a filling line for alcoholic beverages was analyzed. The analysis helped to find the weakest points of the line. The machine which caused the longest downtime was identified. Finally, structural modifications were proposed which would increase the reliability of the machine.