Analysis of Passenger Terminal Space Utilization at Yogyakarta International Airport and Its Correlation with Maintenance Load**

Abstract

Yogyakarta International Airport (YIA) is experiencing inadequate capacity due to low passenger numbers, resulting in low space utilization and maintenance cost inefficiencies. This study aims to analyze actual space utilization, analyze its impact on physical maintenance costs, and test its correlation with costs. The methods used include identifying operational and non-operational space utilization, calculating the ideal space area based on Level of Service (LoS) C standards, and analyzing maintenance logbook data. The results show that only 48% of the terminal area is used operationally, but the actual space requirement based on LoS C is only 3.10% of that area, indicating spatial and financial inefficiency. It was also found that approximately 12% of total physical damage occurred in non-operational areas that still absorbed maintenance costs. There is a significant correlation between low space utilization and disproportionately high maintenance costs. Therefore, mitigation strategies such as optimizing space zoning and implementing a utilization-based maintenance system are recommended to improve facility management efficiency.