“Expect no documentation”

Documentation can sometimes be found checked in with source code, in wikis, buried in Sharepoint sites or OneNote. Wherever it may exist it will be out of date by the time you find it.

Documentation can only be up to date if the code never changes or you have a team of incredibly rare developers who like to read and write documentation more than code. Don’t fret unless nobody has the source code.

Code is always the best documentation of an application. If you have properly documented your code, chances are that anyone maintaining the application will be able to understand it better than a set of UML diagrams.