A new geometrical approach to design centering of analog circuits is presented. It is based on the use of symbolic analysis techniques, which permit to perform only one simulation of the circuit in order to determine a set of parameter values maximizing the manufacturing yield. The new approach can be an advantageous alternative to preexisting techniques of design centering, whose major limiting factor is constituted by the considerable computational effort required for simulating many times the circuit under consideration. A program implementing the new design centering approach has been realized. Its application to circuit examples, already presented by other authors, is reported in order to compare the results obtained through the developed procedure with those of preexisting techniques.