This research paper describes the implementation of a preventive maintenance plan for the critical machines and equipment involved in the production process of the Atlanta Metal Drill SAC company, guaranteeing an increase in the operational availability of the equipment of the workshop Of the company, in an efficient and safe way. In order to meet this objective, it was necessary to collect information on the history of failure times of all the machines in the area of master, being a total of 23 machines with which the company has such as lathes, milling machines, boring machines, welding machines, Compressors, crane bridges and drills. The machines under study were subjected to a criticality analysis, resulting in four critical machines due to their higher incidence of failures: vertical lathe lathe lathe and boring machine. The maintenance indicators were then calculated, obtaining a l...