A Bluetooth Low Energy-based real-time location system deployed at Yongin Severance Hospital cut COVID-19 contact tracing labor by 99.8%, reducing per-case time from more than 12 hours to about 10 minutes. The workflow used automated contact mapping rather than manual follow-up. The reported productivity gains point to operational bottlenecks in outbreak response, especially where staff shortages and high patient volume limit the speed of tracing and notification. For digital health leaders, the implications extend beyond COVID: the same localization infrastructure can inform exposure notification and care coordination processes during infectious disease waves.