A new ENERGY STAR specification for commercial ice makers went into effect in January 2018. Under this spec energy savings opportunities arise form efficiencies in heat exchangers, compressors, fans, and motors. The RTF's measure identifiers are broken out to align with this specification based on equipment type (batch versus continuous), design configuration, and ice harvest rate.
There is some uncertainty around duty cycle, the RTF opted to assume a 60% duty cycle rather than ENERGY STAR’s 75%, but the measure being a small saver means that no additional research is warranted.