One other point about expectations is the that the business often tend to downplay theirs, especially when cost is involved, until something goes wrong .. then you find out about mission critical apps/data/etc they dismissed with comments like " we can manage without X' " no we don't need all the phones working - just a single line will do" etc. etc.

From a DBA point of view, beware reliance on other parts of IT, at an employment we tested DR to another site ( basically we paid to have an office available for 350 people with PC's etc. etc. ) anyway as part of my sql server docs I generated html docs from the servers with all sorts of important info. "Put them on the intranet" said the ops guys then they're part of DR and you'll always have them. OK so I arrive on site with my backups and get down to rebuilding my sql servers. I ask for the intranet files, " Oh we don't rebuild the intranet until day 2 "  So beware of deending on others even within your own dept .. I'd not done my DR correctly as part of mine relied on another part. < grin >