The five main Types of Maintenance in the field service industry are preventive maintenance, condition-based maintenance, predictive maintenance, and predetermined maintenance. Preventive maintenance is usually carried out in the form of regular inspections, and aims to catch and fix a problem before it becomes serious. With condition-based maintenance, devices or systems are observed for patterns that could indicate failure or the need for repair. Predictive maintenance, a type of condition-based maintenance, is the most advanced of them all. It leverages IoT triggers to continuously and remotely monitor system performance, feeding the real-time data to software which then interprets the device information for signs of future failure. Predetermined maintenance uses device statistics and guidelines to estimate when a piece of equipment will require inspection.