1. A method implemented in a computer infrastructure, the method comprising: separating products into different segments based on a manufacturing distribution of the products applied to a manufacturing process window; calculating a power estimation for each segment based on operating conditions of each respective segment; and calculating an average system power estimation for a plurality of the segments, wherein at least one of the separating, calculating the power estimation, and calculating the average system power estimation is performed using a processor, wherein the calculating of the power estimation for each segment and the calculating of the average power estimation are used to manufacture electronic circuit elements, wherein the separating the products into different segments comprises: dividing the manufacturing process window into the segments based on the manufacturing distribution; and calculating an expected amount of product in each of the segments, wherein the expected amount is a distribution percentage, and wherein the calculating the average system power estimation comprises: calculating a power for each segment by multiplying the distribution percentage for each segment by the power estimation calculated for each segment; and summing the power for each segment.