Just as it is necessary to plan a software project, it is also advantageous to learn from the experience of a software project as well. In the PSP course, a lot of postmortem time is spent calculating the various metrics and recording them. The Process Dashboard will take away much of the tedium associated with a Postmortem analysis.
For the most part, the work involved in a postmortem for a project that uses the Process Dashboard is automated. The dashboard knows how to fill out the Project Plan Summary form with all the derived metrics that are a part of the PSP, and it also knows how to create many helpful graphs to let you get a visual feel for how the data look.
The main thing that isn't done automatically is the final LOC counts. You can use the built-in LOC counter, or an external LOC counter of your own choosing, to calculate LOC; then enter the final counts on the Project Plan Summary form (for PSP levels 0 and 0.1) and on the Size Estimating Template (for PSP levels 1 through 3).