In order for the Cool analysis to automatically calculate the cooling time, the program needs to know the frozen percentage at ejection target.
The frozen percentage at ejection is a user-specified input, and is the percentage through the part thickness, which should be at or below the ejection temperature, in order for the part to be ejected. By default, this value is 80%, but can be changed if required. Once the part has reached the specified percentage frozen, the cooling phase will end and the part will be ejected from the mold.