The guidelines say Characteristic for "The scale or dimension by which items are compared", etc. "screened by height". Could make this "compared or evaluated" to include judge by.
Characteristic~Instrument is also plausible: the factor is used by someone to evaluate something.
http://www.xposition.org/en/by/Instrument--Instrument/
The guidelines say Characteristic for "The scale or dimension by which items are compared", etc. "screened by height". Could make this "compared or evaluated" to include judge by.
Characteristic~Instrument is also plausible: the factor is used by someone to evaluate something.