Total Productive Maintenance (TPM) has been adopted by many industries in order to reduce wastage minimize downtime and improve the Overall Equipment Effectiveness (OEE). OEE is a primary metric used in TPM for monitoring and improving the efficiency of a machine or production line in the production industry. Therefore this study is mainly focused on evaluating the OEE of machines in the nail production plant of Kombolcha steel product industry PLC (KOSPI) in Ethioipa. TPM is a useful industrial