Definition of Ready, Done? What about a ‘Definition of Broken’?

As the IT world has been largely taken over by Agile methods, the concepts of Definition of Ready and Definition of Done have become mainstream. While these concepts were introduced at the story/sprint level in Scrum, they have taken on a wide role and are generally used at all levels these days, not just on stories, but also on features and epics, the larger items in the agile-tree. There is, however, a new concept that maybe very helpful at the higher levels that we might use: a Definition of Broken.