Abstract: In the real production,process indices are often difficult to be controlled at some certain values, based on which the problem of optimization for quality cost control is put forward to the decision-making for quality control scope.For example,a quality cost function is defined based on marginal analysis for the applications of optimization for quality cost control of calcium carbide products.Thus the optimization for their quality cost is modeled with the nonlinear programming method founded on the decision-making for quality control scope.The solution of the proposed model is deduced and verified by effective data further, which indicates that the proposed method is better improved than ever.

Key words: quality cost, quality cost function, optimizing