Why one that's done really REALLY well of course, not just any old ordinary audit but a real quality one....... :-)
Joking of course, I believe it's more in relation to the auditing of pre-agreed and company laid down quality and production procedures used as part of things such as gaining ISO accreditation and allowing the Company / auditor to monitor exactly those agreed processes are working / being carried out and reporting same back to the company / ISO manager to enable them to further improve their "quality" procedures.......I believe that's about right and can vouch for Latin's discussion re general travel and subsistence allowances being charged and paid as I recall having a run in with the ISO monitoring company who was coming to audit my company. They were billing me something like £200 for a flight, £200 a night for a hotel and perhaps £150 subsistence - this was for a short hope from Manchester to Belfast. I pointed out the flight was £80 and a hotel the same and we would provide all food etc for the guy as we'd be taking him our on the piss etc - tough, non negotiable I was told - funnily I gave up on the idea of ISO accreditation not long after and haven't missed it one bit !
But Latin, do please feel free to enlighten us as I'm only going from my limited experience with the one guy.....