Efficient Ways to Work with Requirements

This talk is about the cooperation between test organisations and the people working with requirements. How do we work as efficiently as possible? When during the project lifecycle can we gain from each other? How do we best gain from each other? When do we think alike and what are the crucial differencies in the way we work and think? What is a testable requirement? How to work during changes in the requirements? How to inprove our relationship in order to create the best product ever?