...selection and justification of your production pipeline (eg what combination of software did you use and in what ways did they work collaboratively)...
the processes in creating drawings. eg, did you draw out your orthogonals or pictorials manually, or get the computer to aid in generating these from a 3d model?
you could get on to borderline things that aren't really graphics if you are really desperate, (such as file management processes, versioning (revision control) processes, but I'm not sure how relevant that may be.
there's heaps of stuff....