ABSTRACT This study aims to determine the factors that influence the maintenance of diesel power plants (PLTD) at PT. PLN (PERSERO) Tembilahan Riau Region Branch in Tembilahan Parit Empat and to find out the company's policy in maintaining diesel power plant (PLTD) maintenance at PT. PLN (PERSERO) Tembilahan Riau Region Branch in Tembilahan Parit Empat. In this study, the population was a…