Unplanned equipment failure costs industrial facilities an average of $125,000 per hour in lost production, and in continuous process operations, that figure is much higher. Preventive maintenance programs are how leading operations in oil and gas, chemical, and manufacturing cut that risk systematically, replacing costly emergency repairs with scheduled, controlled interventions. This guide covers what preventive maintenance is, how to build a program, and how enterprise teams are now using connected worker platforms and AI to execute PM at scale inside SAP and IBM Maximo environments.