Computerized Maintenance Management System (CMMS) is a tool tailored to support maintenance business functions of production systems. Market available CMMS software programs seldom meet the needs of each organization's peculiar maintenance functions. Therefore, this work investigated the effects of CMMS on a cement production plant. The materials used included a Computer and Networking system and maintenance software. Preliminary study via interview among the relevant maintenance staff members of the plant was conducted to identify critical plant assets. Critical assets considered under this study are Limestone Crusher (LC), Cement Mill (CM) and Kiln (KI) among others identified. Key Performance Indicators (KPIs) such as Plant Reliability Factor (RF), Number of Stoppages for Incidents (NSI) and Production Losses (PL) were used as basis for the evaluation which covered period from year 2013 to 2015. The result obtained from this implementation showed that RF for LC,