During my university days we watched a great short video series about the American design firm IDEO called The Deep Dive. I remember at the time being told that we’d have to order the tape (VHS!) from the ABC in the U.S. well advance a decade into future and we have the wonderful resource called Youtube. So thanks to Youtube, here it is in 3 parts. And I thoroughly recommend it for any design student.
Mr Sully's Blog 