관찰감가법을 적용한 건물 감정평가의 신뢰성 영향요인 실증분석과 시사점

Empirical Analysis of Factors Affecting the Reliability of the Observed Depreciation Method in Building Appraisal and Its Implications

This study conducts an empirical analysis of the factors affecting the reliability of the Observed Depreciation Method (ODM) in building appraisal, and discusses the practical and institutional implications of its application. Despite its practical advantages, the ODM has faced criticism due to its inherent subjectivity, inconsistent results, and a lack of clear evaluation criteria. To explore the factors influencing the perceived reliability of the ODM, data collected from 285 licensed appraisers were analyzed using multiple regression. Eight independent variables were examined, including professional expertise, ethics, data accessibility, and various institutional factors. The findings indicate that ethical responsibility, technical expertise, ease of accessing cost data, and the ability to refrain from subjective judgment significantly enhance the reliability of the ODM. Conversely, factors such as the difficulty in explaining depreciation, analytical limitations, and the absence of standardized criteria did not show significant effects on reliability. This suggests that individual competence and ethical awareness play a more influential role than formal guidelines in determining the reliability of the ODM. The study concludes by highlighting the need to improve ODM reliability through enhanced professional training, stronger ethical standards, and better access to cost data. These improvements are expected to contribute to a more robust foundation for trust in real estate appraisal.