• The two classification devices had previously been calibrated based on the results of two different dissection experiments (OGP in 2005, FOM in 2003) and therefore on two different pig populations — as allowed by EU legislation (although discouraged by experts)when classification devices are introduced at different times. Hence the classification of a carcass batch performed separately with the two devices provided two different results (the gap between the lean meat percentage measured with the OGP and FOM probes was on average 2.43% for the period Q3/2006–Q2/2008, prior to implementation of the results of dissection experiment for calibration of the two devices). This created a need for standardization, so that a producer would be paid the same price for one batch of pigs delivered to the slaughterhouse, regardless of the equipment used for classification.