I was poking around on the web a bit and found an interesting Swedish management blog. They have a blog post with a video where David Kelly speaks about Design Thinking. Here is the video. It is worth watching:
Here is the original page where the videocast was published.
Design Thinking is very close to Systems Thinking. My view is that Design Thinking is an excellent method, fitting right in with the Systems Thinking method package, or methodology. (A methodology is a set of methods based on common ideas.)
Design Thinking is both fun and powerful. Well worth studying, learning, and, not the least, enjoying!