I am looking into predictive models that can predict the level of effort (ie # of hours) it will take to fix a defect in software. It seems like a very basic, logical activity where there would be multiple datasets. But I can't seem to find any. I looked at PROMISE, COCOMO, etc. I see a lot that have the found date and resolved date. But a resolved date doesn't tell me the level of effort it took to resolve the defect.