‘Document’ is so much better than ‘deliverable’ as a label. UX documents are information objects and need to be designed as such: comprehensive, attractive and understandable.
“Like all good usability professionals I’m sure that you’ve previously carried out usability testing on a design, or perhaps watched usability testing sessions taking place. But have you ever usability tested a document? Why not? In the same way that usability testing will give an indication of how usable and appropriate a design is, it can also do the same for a document.”