In routine applications, the legacy of solving the optimization and using the results will have given customers and implementers a good understanding of the context of the application and the appropriate choices for the models OF, DV, convergence criteria, thresholds, and constraints. However, for new applications, the implementer must design these procedures and must make the appropriate choices. The question is “How?” The answer is “trial and error.” Try something, and when you have the result, consider all aspects of the outcome. Then evaluate whether all aspects are satisfactory. If not satisfactory, improve the procedure.