The following two figures (Figs. 5, 6) present the predicted vs. actual results (lean meat percentage) of the linear regression formula of the OGP and FOM models. In both figures the plots resemble a 45 degree line, demonstrating strong goodness of fit. The residuals are generally evenly distributed around the 45 degree line, without following a clear pattern through different values of the lean meat percentage. If changes occur in the pig population that would significantly improve the lean meat percentage to be higher than 63%, a revision of the prediction model is recommended since these models show some underestimation for extremely high lean meat percentages. The results of the above analysis indicate that the regression models developed in Romania for measuring carcass quality using the OGP and FOM optical probes were appropriate.