Are any special considerations needed when creating TWO COOL® models for subsequent use in PRO COOL®?
PRO COOL® process cost analysis software uses TWO COOL® cost of ownership software to estimate the cost of a sequence of process steps or a cluster of process tools. PRO COOL® reads the 13 TWO COOL® cost drivers from the COO model summary along with yield and utilization information. The use of COO summary information can lead to differences in the way PRO COOL® and TWO COOL® respond as utilization or throughput rates are changed. These differences can be minimized the taking the following precautions in constructing COO models specifically for use in PRO COOL®: Enter material, consumable, and utility costs as a cost per unit (wafer, package, or mask) rather than as an annual cost. (For further information see PRO COOL® Technical Alert #5, “PRO COOL® vs. TWO COOL® Comparison.” Enter software development costs, including test software: if development costs are in currency (per year) enter as “Annual Software Contract per System” if development costs are in hours (per week) enter as “Per
