This paper outlines the application of Lean Six Sigma principles in enhancing inventory management at a water and electricity distribution company. Employing the DMAIC (Define, Measure, Analyse, Improve, Control) methodology, the project targeted critical inefficiencies in the inventory systems, particularly focusing on electrical and mechanical equipment. Key achievements included a significant reduction in lead times from 13.08 days to 3.08 days, considerable cost savings, and enhanced operational efficiency. The integration of tools like Value Stream Mapping, Refurbishment operations, and advanced forecasting models facilitated these improvements, demonstrating the effectiveness of Lean Six Sigma in optimizing complex inventory systems.