I just finished listening to a very eye-opening podcast on Hanselminutes about the definition of "Done". So my question to everyone is "When do you consider a piece of software to be "Done"? Is it when it's fully unit tested? Is it when it's completely documented? What measurement do you use in your development process to determine Doneness of your software?
When the check clears?
Seriously, every time you write a piece of software, you should have defined what "done" means. First. If you have a customer, then there should be a contract -- specific, measurable, agreed, and testable -- that defines done.
If you don't know where you're going, how will you know when you get there?