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 tool to improve the competitiveness and effectiveness of industries. This book provides step by step practical approach for successful implementation of TPM. TPM helps to raise the value of the OEE by identifying the nonvalue added activities and eventually eliminating them. OEE is used to measure productivity of the machines using three elements which are performance, available and quality. The concept of OEE in Ethiopian manufacturing industries is the critical missing concepts in successfully achieving not only world class equipment performance, but also it is a powerful new means in improving over all industry performance.