Optimizing simulation models may require the use of a nonlinear direct search method such as the Box-Complex algorithm. The Box-Complex has been found to be inefficient in some cases in deriving optimal solutions for simulation models. This paper presents results from a modification of the Box Complex designed to derive more efficiently optimal solutions. The potential efficiency of the Modified Box-Complex is illustrated by using it to solve two problems on which the Box-Complex had been found to be inefficient. The Modified Box-Complex may offer considerable savings in computer time and cost for some problems.
