I’m still experimenting with Dialogue Sheets for Retrospectives (the download page, and my earlier blog entry) and so are other people. Of the feedback I’ve had so far it has been overwhelmingly positive. Perhaps people who aren’t positive don’t bother trying them.
Usually failures result in anger, frustration and playing the blame game. However, failures are wasted if there is no learning from them. How can Agile teams make failures beautiful?