Like ronelson I don't understand what you mean with "As-Built documentation". Please elaborate. I keep something like run books or log files for servers, but as files.

The U. S. Institute for Building Documentation has published the first standards for specifying contracts for as-built building-measurement capture. The documents are designed to complement ...

If the documentation was there, it would have resulted in a 30-minute service call — and it would have been a lot cheaper, as this call cost the customer more than 10 times what it should have.