I have not read Tim Brown’s book Change By Design, but this TED talk strikes me as very valuable in itself. I look forward to reading the book which has just been published. The focus on involving end users, rapid prototyping, systems thinking resonates for me. Lean practitioners will find much in common here. It is great to hear a designer talk forthrightly about the ephemeral nature of most design efforts and even alluding to how much design is gratuitous design.