There is a very nice article about Yves Behar and his 7 Principles of Holistic Product Design on TriplePundit’s coverage of the 2011 Opportunity Green Conference in Los Angeles, California.
Here is the first one:
1. Start with questions, not answers.
Instead of trying to design a product from a detailed client brief that dictates the answers, the design process should start with a few simple questions. For example, Puma asked the question, “What can we do to improve the sustainability of our already very successful shoe box?” This question spurred an in-depth exploration of the company’s logistics, manufacturing, distribution, and customer interactions with the product. see the other 6 and the whole story on Triple Pundit
I also added this principles to the Inspiring principles for design, life and more Mindmap on Mindmeister.com.