The effect of adding polycaprolactone (PCL) on the impact behavior of poly(lactic acid) (PLA) has been evaluated. Bioblends (with and without compatibilizer) were prepared in a pilot plant (twin screw extrusion, 5kg/h) in different compositions. Impact testing was carried out using instrumented falling weight impacts at room temperature on plates obtained by compression moulding (100x100x1 mm3). This method has served as a quality control technique and has allowed optimizing the processing conditions at a pre-industrial scale, as well as the composition of the different blends. The results revealed that the compatibilizer efficiency is not only governed by its weight fraction in the blend but also by the homogeneity and uniformity of the obtained blend morphology.