Maintenance Cost Working Group Results

For the proper functioning of Accelerators, Experimental areas, Workshops and other CERN facilities, maintenance of infrastructure is one of the main activities in the EN department. Over the last ten years, the resources and budgets allocated to maintenance were decreased while the pool was increased. The EN groups have adapted maintenance plan to cope with this situation. In 2021 a working group was launched to analyse the existing situation and propose a common approach. This paper will present the results of this working group, starting with an inventory of the existing practices in each EN group including a comparison with applicable laws, manufacturers requirements and a benchmark with other Organisations. Another main achievement of the working group was the definition of the Key Performance Indicators to better monitor the evolution of the equipment condition as well as performance of maintenance. A common definition of criticality, maintenance annual report and CMMS guidelines was also part of the results obtained by the working group