Welcome to the Cove, Beerman!
Audits, and methods to conduct them, have been discussed at quite some length here in the Cove. I would suggest that you do a search (Yellow 'button' in the upper right of the screen) and review some of these discussions.
Something to keep in mind...the means of conducting an audit, including who's involved, resources used, etc., may differ depending on the type/level of audit.
I also did a search in the attachments list (upper screen...green 'button') and came up with Internal Audit files