In this paper a software tool is presented which is capable of producing testability metrics for analog and mixed-signal circuits. These metrics are obtained by performing probabilistic analysis techniques. The presented tool acts as a shell utilizing the power of state of the art external schematic and simulation programs and offers to the user a graphical interface for circuit design and test. This interface is transparent to the user elaborately hiding all the complex task manipulations. Preliminary results are presented showing the effectiveness of the proposed scheme.