The degree of eligibility of the temperature curve is represented by a simplified value
In order to obtain the accurate process value, the process window index (PWI). PWI is a simple value in KIC software. It objectively reflects the degree to which the measured temperature curve meets the requirements of the process specification from a mathematical point of view. The method of optimizing the process is to replace the description of the curve measurement with the effective process window by comparing and ranking. The lower. The higher the process efficiency, the more stable!