Results in Table 8 confirm that considering a sub-set of all possible molding patterns may generate sub-optimal solutions, since that solutions provided for all the 12 instances by the proposed model are better than the solutions of the GLSP approach. On average,the proposedmodelprovidedsolutionswithtotalcosts21.34% lower than the GLSP solutions. The best case was for instance 11, where the cost of the solution provided by model (1)–(19) was approximately 49.7% lower than the provided by the GLSP.