One thing I think is missing from a lot of processes or tools is feedback of some kind comparing expectations to reality to help you set more achievable goals and better timelines in the future.

If I have a goal to do X within a month and it takes me two instead, I should look back and see where the discrepancy was. Did other things come up I didn't account for, or did the process take more manhours, or was more research/training required to have competency to complete the task?