Auction houses employ a meticulous process to evaluate and appraise rare or one-of-a-kind porcelain sculptures, ensuring authenticity, historical significance, and market value. Experts begin by examining the piece's craftsmanship, including details like glaze quality, kiln marks, and artistic techniques, which often reveal its origin and era. Provenance research plays a crucial role, as documented ownership history can significantly enhance a sculpture's worth. Scientific methods, such as thermoluminescence testing, may be used to verify age and authenticity.

Market trends and collector demand also influence appraisal, with auction houses comparing similar pieces from past sales. Condition is another critical factor—flaws or restorations can drastically affect value. Ultimately, a combination of art historical knowledge, technical analysis, and market insight allows auction houses to assign accurate valuations to these exquisite works of art.