Readings: Design Brief Descriptions

Hi Folks,
Here are a few links to desciptions of what a few people think constitutes a design brief. Compare them to find what commonalities you see and what differences you see. After reviewing these different opinions what do you think should be in a design brief and how do you think it would be most effectively used in practice. What additional elements will you add to your "Push Stick Design Process Brief" that go beyond the information, methods, and or uses listed in the linked documents below? You are making a promotional piece for yourself. How does that piece differ in needs and functionality from a tradition design brief?


http://www.cleardesignuk.com/design-brief.html

reverse engineer this one:
http://freelanceswitch.com/clients/the-ultimate-design-brief/

note the points on collaboration and authorship/ownership:
http://www.graphics.com/modules.php?name=Sections&op=viewarticle&artid=235

simple and clear relationship drawn between problem and brief
http://www.technologystudent.com/designpro/problem1.htm

the brief as contextualized as a pitch
http://ideadog.wordpress.com/2006/10/20/how-to-write-a-good-designidea-brief/