on last test day multiplied by the number of days from the last test day through the end of lactation.For lactations with ≥305 DIM but with no test day at≥305 DIM, the credit for the last test period was the yield on the last test day multiplied by the number of days from the last test day through d 305. The center-ing date method generally overestimated actual yields until peak lactation as well as yield during the period following the last test day but under estimated yields for other test periods.
Comparison of Test Interval and Best Prediction Methods for Estimation of Lactation Yield from Monthly, a.m.–p.m., and Trimonthly Testing (PDF Download Available). Available from: https://www.researchgate.net/publication/13221765_Comparison_of_Test_Interval_and_Best_Prediction_Methods_for_Estimation_of_Lactation_Yield_from_Monthly_am-pm_and_Trimonthly_Testing [accessed May 8, 2016].