This European Standard specifies the qualification of the personnel with regard to the tasks to be performed in the context of the maintenance of plant, infrastructure and production systems. In this European Standard, maintenance of plants and buildings is included in terms of technical aspects of services. This European Standard guides to define the knowledge, skills and competencies required for the qualification of maintenance personnel. This European Standard covers the following professional persons in the maintenance organization: - Maintenance Technician Specialist; - Maintenance Supervisor and Maintenance Engineer; - Maintenance Manager (Responsible of Maintenance Function or Service). This European Standard does not specify the verification criteria nor the specialized training of the personnel, which is related to the specific commodity sector. NOTE – Specialization and profession are the subject of the training carried out in the relevant sector.