Estimating maintenance effectiveness of a repairable system under time-based preventive maintenance

Corrective maintenance (CM) is carried out to fix failures while preventive maintenance (PM) is to avert failure. They both play an important role in physical asset management. Accurately estimating the effectiveness of PM is needed as it has an impact on system health management. Given failure times and maintenance related data, it is possible to estimate maintenance effectiveness. This paper proposes PM and CM models based on the different combinations of the type of maintenance carried out, estimates the parameters in those models, simulates their failure intensities and then studies maintenance effectiveness using maintenance data of industrial equipment.