Preventive maintenance programs are implemented for all machines and equipment. The maintenance program includes preventive, predictive and corrective activities, complemented by periodic inspections and based on the manufacturer’s recommendations or in line with industry standards or the experience of their maintenance team. A computerised maintenance management system is applied for maintenance programs and part inventory control. Major maintenance works are conducted annually during the scheduled shutdown. Daily, weekly and monthly inspections are carried out by the maintenance staff, based on the developed schedule. The special works i.e. the inspection and maintenance of electrical system, transformers, boiler and etc. or other specialty works are carried out by outsourced contractors. Currently, the maintenance department has approximately 70 experienced staff.