ABSTRACT
Weighing designs are treated in detail in the literature. Although many mass measurements are made by comparing an object or weight the mass of which is to be determined with a weight or standard of known mass, in many instances it is neither practicable nor desirable to compare each weight in a set with a standard of known nearly equal mass. A combination of two or more weights of unknown mass can be as easily compared with a weight of known mass as can a single weight. Weighing designs can be used for many different kinds of measurements and are particularly used by laboratories that perform a large number of routine mass calibration measurements of laboratory weights. The extraordinary time required compared to a simple one-to-one calibration yields invaluable statistical data that are necessary to assign realistic uncertainty estimates.
