This paper is the continuation of a previous one where a case study dealing with the optimization of a chemical compound was presented. In the previous paper the optimization was accomplished taken into account only quality. The present paper expands what was done previously in several ways: (i) the costs due to poor quality are expressed in monetary units, (ii) production costs are modeled, (iii) a global cost function is presented, and (iv) an optimization study which defines the best set for the control factors (quantities of mixture components) is performed. Besides presenting an operational window which contains the global optimum, the applied method allows one to quantify the terms that contribute to the mixture total cost. Thus, if for strategic reasons the global optimum has to be abandoned (e.g., to reduce production costs or to maximize quality alone), the models presented indicate the way to follow
Quality; Production Costs; Optimization; Chemical Mixture