Global market rivalry is becoming more intense. A number of organisations have come to understand how important it is to raise their own game. The resources that are available may be used to do it. In the sector, cutting waste is crucial to increasing efficiency. This article examines a case study of a resin cast transformer manufacturing firm where the monthly financial loss to the business is around 3,40,000 rupees due to 8.87% of the resin waste. Additionally, there is an increase in cycle time, which raises lead time and causes customer discontent as well as a competitive disadvantage. Analyse the existing scenario using various lean tools. Broken casting, bucket waste, and drum waste all significantly contribute to resin waste, according to an examination of the existing state of affairs using several lean tools, such as the Pareto chart, fishbone diagram, why-why analysis, and process flow diagram. We were able to cut resin waste by 44.19% and rejection by 39.64% by consistently implementing the PDCA cycle to every part of the process. The industry's monthly savings by cutting resin waste from 8.87% to 4.95% is 1,52,880 Rupees.