First, the recorded information provides producers with the raw material they need to implement selection programs aimed at making genetic improvement in their herds. It is difficult for producers to permanently improve their milk production if they have no performance records upon which to make their selection decisions. Second, as a marketing tool for seedstock producers, test results allow the public and potential customers to know the performance merits of individual animals and herds. While performance information need not be public to be used effectively in a selection program, it's public dissemination is extremely useful in buying and selling breeding stock. A third reason appeals to the competitive spirit that exists among some dairy goat owners.
Many factors influence milk yield.
Some are within the goat, such as genetic potential and maturity level. Others are external, such as the feed supply, the weather conditions and climate, management practices, and disease challenge. Ultimately, the producer's desire is to assess the genetic potential of a doe and her sire for milk yield. The test focuses on yield is because it is the basis on which producers generally get paid. Directly or indirectly, the more milk produced, the more income the doe generates.