a mathematical analysis of a horse's pedigree, based on sires being placed in one or more of five categories: brilliant, intermediate, classic, solid and professional.
Although there are actually many "Dosage theories," the one most commonly thought of as Dosage is the one as interpreted by Dr. Steven Roman. A variation of Dr. Franco Varola's work on pedigree analysis, the system identifies patterns of ability in horses based on a list of prepotent sires, each of whom is a chef-de-race. The Dosage system puts these sires into one of five categories brilliant, intermediate, classic, solid and professional, which quantify speed and stamina. Sires can be listed in up to two chef-de-race categories. Each generation of sires is worth 16 points, divided up by the amount of sires, i.e., the immediate sire is worth 16 points while the four sires four generations back are worth four points apiece.