Direct comparison method.
(4) Direct comparison method. An equipment testing procedure wherein transfer standards are tested at the same time and place to compare the performance of two or more units of the same inpsection equipment. One unit of the equipment used in the test shall be standard inspection equipment. (See also sample exchange method).
Source
7 CFR § 801.2
Scoping language
Construction. Words used in the singular form in this part shall be considered to imply the plural and vice versa, as appropriate.