The OEE tool gives the ability to measure the machines for productivity improvements. OEE not only measures inefficiencies but groups them into three categories which are availability, performance and quality to help analyze the machine and have a better understanding of the manufacturing process. This study intended to apply overall equipment effectiveness (OEE) as a performance measurement tool to measure the effectiveness and performance of the automatic fettling machines in a foundry plant. Apart from this, the study employed to conduct the analysis part of the study where data have been computed to provide information for decision making. The primary findings of this study were the possible factors that dominantly affect the equipment effectiveness in the machine. These findings were used to serve as a guideline to improve the OEE for the selected machines. Ultimately, it was recommended that the Foundry plant employs OEE as their primary performance measurement tool.In this project, the OEE level was analyzed and found out that Availability and Performance level of the machine is very low, which lower the OEE Levels.