Estimates of genetic merit vary in how accurate they are. several factors interact to determine accuracy. SIL produces estimates of accuracy for BVs.

The following technical notes are available:  

Accuracies for SIL breeding values *** NEW ***
In January 2011 SIL introduced accuracies for SIL BVs. This document describes what this means and how to use them.

Accuracy - BVs and indexes
Factors affecting the reliability of breeding values and indexes

Accuracy - amount of data from sib & daughter lambing
Factors affecting accuracy for reproduction traits 

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