This study presents the first academic analysis of Korean Green Button data, examining electricity consumption of 422 public institutions over 36 months (2022-2024). The methodology integrates EUI-based national grading for absolute performance assessment and K-means clustering for relative evaluation within the public sector portfolio. Results reveal a significant divergence: while 82.2% achieved Grade B or above under national standards, K-means clustering identified 14.9% as "needs improvement" relative to peers—with mean EUI 6.4 times higher than high-efficiency institutions. Government building management agencies demonstrated superior performance (46.2% high-efficiency), while basic local governments showed the weakest profile (25.0% needs improvement). This study demonstrates that comprehensive public sector benchmarking requires both absolute standards for regulatory compliance and relative assessment for continuous improvement targeting.
고현아Ko et al. (Tue,) studied this question.