A method for optimizing the location of heating elements within a mold for a rubber article. The position of one or more heating elements, e.g., curing pins or sipes, within the tread mold for a tire can be determined using a 3-D temperature profile so as to improve the efficiency of the curing process. For purposes of the optimization, the number of possible locations for such heating elements can be varied depending upon e.g., the computational time and accuracy desired.