We are often asked about the accuracy of the core biological model, especially when people have had good success using previous versions of the biology.
Attached you will see a pdf where Dr. Van Amburgh calculated stats on accuracy and some herd level experiences from CNCPS 6.1 biology. I think the data clearly speaks for itself. NOTICE: This is 6.1 biology specifically and is only available from licensed groups.
As for accuracy of earlier biological versions, I will find the data (it is published) but can assure you that it was significantly lower (while still good, it just had bias and more scatter).
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