The IEC 60034-2-3 and 61800-9-2 test methods both specify interpolation techniques which estimate losses for components of a Power Drive System at arbitrary load points given a known grid of performance values. These techniques are a foundation for potential calculated efficiency or other analytic PDS efficiency determination methods for US regulatory development and compliance. Our Motors Coalition Working Group seeks to develop a best case validation dataset, which enables high precision comparison between lab measured and calculated performance, especially at the forthcoming NEMA PI 2024 operating points. This project specifies several departures from default IEC test guidelines to reduce within product and between product variability, maximizing the utility of this dataset for evaluating these interpolation models. Additional specification is provided for: equipment sizing, initial setup, runtime programming setup, measurement guidance, and motor thermal constraints.