Maintenance
According to the AFNOR definition, maintenance is intended to maintain or restore property in a specified state so that it is able to perform a specified service. The maintenance thus regroups the actions of troubleshooting and repairing, adjusting, reviewing, checking and verifying hardware or even immaterial equipment. A maintenance department may also be required to participate in studies to improve the industrial process and, like other departments of the company, must take into account numerous constraints such as quality, safety, environment, the cost, etc.