Read the text and answer the questionsAny machine and device must be controlled regu larly in order to avoid the risk of damage or breakdown of single parts due to long usage. Sometimes, if a proper maintenance is not done, a fault could occur, with negative consequences on the production process and on the workers' safety. The primary goal of maintenance is to avoid or mitigate the consequences of failure of equipment. This includes performing routine actions to keep the device in working order and prevent the failure before it actual ly occurs (preventive maintenance) , or fixing equipment after breakdown (corrective maintenance).Preventive maintenance is designed to preserve and restore equipment reliability by replacing worn components before they actually fai l. It includes maintenance activities such as partial or complete overhauls at specified periods, oil changes and lubrication. The ideal preventive maintenance is a combination of technical, administrative and manageria l actions to prevent all equipment failure. If carried out properly, preventive maintenance can extend the life of the equipment.Corrective maintenance, sometimes simply ca ll ed 'repair', is carried out to get equipment working again. It aims at restoring the functionality of a machine so that it can continue to perform its work. This type of maintenance can be very expensive because sometimes equipment needs to be replaced, with substantial costs for the company.Generally, maintenance is scheduled according to:• the original equipment manufacturer's recommendations;• codes and leg islation within a country;• consultancy advice;• previous maintenance ;• most important measured values and performance indications.