The purpose of this paper is to describe and demonstrate a quantitative procedure for evaluating alternative computerized manufacturing control software packages that are being considered for possible purchase. The procedure considers both quantitative factors (i.e. costs) and qualitative factors (i.e. vendor reputation) that should be considered in the evaluation process. The various evaluation factors and criteria are identified and a procedure for quantifying the factors in commensurable unite is described. The procedure is demonstrated via an example.