Don Norman on some key elements of Design Thinking:
Of course, there is more to design thinking than what is described by the double-diamond or the iterative cycle of HCD. One has to do with a deep understanding of the people for whom the product is intended, which means observation—not questionnaires, not focus groups, but observation and deep empathy with the target users. Another is ongoing experimentation—continual sketching, testing and trying out concepts and ideas. Another is the process of critiquing, whether of one’s own work or of others. And yet another is the emphasis on questioning: question the problem, question the assumptions and implications. What should this collection of techniques be called? Design thinking, perhaps?