Abstract: A Reliability and Maintainability Indicator (RAMI) is disclosed which effectively predicts the remaining time of operation of a system, equipment, component, or device before it would fail to perform its intended functions. The ability of RAMI to predict the remaining time of operation before failure is accomplished by having key parameters of an equipment monitored by applicable transducers to sense measurands periodically over a period of time. Then, these measurands are analyzed to project when they would reach pre-established limits which would indicate equipment failure or serious degradation resulting in the equipment failing to perform its intended functions.A micro-processor based computer is used to analyze the measurands, as required, and correlates them, by means of mathematical extropolation to obtain the time at which failure, or a pre-established limit of degradation of the equipment is expected to occur.