negative comments from unidentified colleagues with whom they could not argue. In some cases, the criticism was copied directly into their performance reviews — a move that Amy Michaels, the former Kindle manager, said that colleagues called "the full paste."
Soon the tool, or something close, may be found in many more offices. Workday, a human resources software company, makes a similar product called Collaborative Anytime Feedback that promises to turn the annual performance review into a daily event. One of the early backers of Workday was Jeff Bezos, in one of his many investments. (He also owns The Washington Post.)