Optimizing Chiller Plant Performance Through OEE Analysis: A Case Study at Terminal 3 Soekarno-Hatta International Airport

The Air Conditioning System (ACS) in airports plays a crucial role in maintaining user comfort and operational efficiency. However, declining performance in chiller machines negatively affects the overall effectiveness of the system. This study aims to evaluate the Overall Equipment Effectiveness (OEE) value of chiller machines at Terminal 3 of Soekarno- Hatta International Airport during July–December 2024, identify the causes of performance degradation, and propose improvement strategies. The research employed a quantitative approach using primary data (observation and interviews) and secondary data from maintenance records. The measurement results indicate that the OEE values are still below the company’s target, with the lowest recorded in Chiller 4 at 77.95% and the highest in Chiller 1 at 80.07%. Analysis of Six Big Losses and Root Cause Analysis (Fishbone Diagram, 5 Why’s, and 5W+1H) revealed that performance degradation was mainly caused by human and method factors, such as the absence of technician training and the lack of sequencing control SOPs. Additionally, problems were identified in materials, machinery, and environmental conditions, including damaged coils, ducting, balancing valves, and cooling tower fillers. Proposed solutions include predictive maintenance, the establishment of SOPs, replacement of damaged components, and the enhancement of technician skills. Implementing these strategies is expected to improve OEE values, reduce downtime, extend chiller lifespan, and support sustainable energy efficiency.