1. Good design is innovative.
  2. Good design makes a product useful.
  3. Good design is aesthetic.
  4. Good design makes a product understandable.
  5. Good design is unobtrusive.
  6. Good design is honest.
  7. Good design is long-lasting.
  8. Good design is thorough, down to the last detail.
  9. Good design is environmentally-friendly.
  10. Good design is as little design as possible.

More details at Vitsoe's website.

About Dieter Rams on Wikipedia.