This study explores the optimization and improvement of OEE (Overall Equipment Effectiveness) of a CNC(Computer Numeric Control) turning machine. The main purpose of increasing OEE is to improve the productivity and production with minimum losses. During the research, our main objective was to reduce the losses to increase OEE. As OEE depends upon three factors i.e. availability, quality, and performance rate so quality rate being top notch the main objective was to focus on availability and performance rate. In our research, OEE is increased by reducing the losses and by reducing the cycle time/product.