The research presented in the paper demonstrates the implementation of single minute exchange of dies whilst considering the critical success factors of lean to manage the waste and cost generated during changeover processes. The aim of the work is to ascertain whether the consideration of lean critical success factors during changeovers has an impact on waste and cost in manufacturing.  The findings indicate that critical success factors provide a practical guide to achieve a fully integrated manufacturing management system with efficient changeover processes and reduced waste. Ultimately, the findings allow organizations to meet customer requirements for a differentiated product line since changeovers could take place more frequently with smaller batch sizes and lower inventory levels.