Software engineering and object-oriented technologies ([1], [3], [4]) represent expectations in supplying the high and increasing demand of the software market for products with guaranteed quality, and of acceptable cost and performance. The quality is sought through the utilization of object-oriented methodologies since the stage of design and implementation until the stage of software’s test. Nevertheless, the quantification of this quality is taken into effect from adequate metrics. Actually, assuring an optimal level of quality is very difficult, since there are few systems that can effectively help designers and programmers to acquire more performance in their activities.