In the technical-scientific field, many decisions are supported by measurements. However, it is essential to assign to measurement results their actual meaning to achieve a correct decision. This aspect is particularly important and formally required when operating in Quality Systems. Therefore, measures management must be rigorous and it can find a concrete support in the topics discussed in this volume, because of the attention to metrological part and the removal of unnecessary restrictions. Giulio Barbato, Alessandro Germak and Gianfranco Genta are professors of "Experimental Statistics and Mechanical Measurements" at Politecnico di Torino. Prof. Barbato and Germak worked for over twenty years at the Italian National Metrology Institute on Primary Force and Hardness Standards and in the field of Accreditation for the Italian Calibration Service.