For each development product, the postmortem phase acts as a review of how well the Hephaestus process worked, and collects metrics to be used as a statistical base for planning future projects.
The postmortem phase doesn't have the same documentation and review constraints as the other five phases, but is as important a tool for quality engineering as the other phases. This phase is necessary to provide feedback as to how well the project met the planned milestones, how the Development methodology needs to be adjusted, and how future project designs should be adjusted.
The Hephaestus Implementation Plan will include a way to incorporate feedback into the Hephaestus User Document.
The items to be considered might include, depending on the project size: