Based on the frame and method of semi-infinite and nondifferentiable optimization technique

the advanced strategy and method of solving unitized model of circuit design centering for manufacturing yield maximization

tolerancing

tuning and cost minimization （DCTT） are proposed in this paper. When the method is used to solve DCTT problem

the circuit characteristics functions can be allowed to be nonconvex and nonsmooth. After the strategy of restraining constraint expansion is introducted

the method can solve larger scale statistical optimization problem. It opens up a new way for further development in the field of statistical optimization.