1. A method comprising: executing instructions by hardware in a data processing system to perform steps including: using a hashing tool to generate Object unique identifiers (UIDs) from a software application; testing the software application for defects; receiving, at a change and release management system, Object UIDs involved in the defects uncovered during the testing; receiving, at the change and release management system, function names involved in the defects uncovered during the testing; creating a heat map of the function names versus the Object UIDs for which the defects occurred; and using the heat map to fix the defects of the software application.