At Pixar, a criticism should come with an improvement. Pixar calls this plussing. “Broadly, plussing requires that any comment or criticism must contain a positive suggestion, or a plus.”
Instead of saying “I don’t like that idea,” a colleague says: “Yes. That looks good and what if we did this.” The writer Peter Sims said of Pixar’s teams: “They don’t use judgmental language when they’re in these team meetings, even if the ideas are really crummy.” The term goes back to Walt Disney, who used it for making a good idea better.