Requirements Confusion

I am a software developer. In my projects I usually get into confusion when starting a new project. Every participant of the project has a different idea of the actual requirements. Reaching a real agreement is difficult. It is easy to cover indeterminate or non-agreed issues. But this won't be true.

I believe that we engineers should be more competent in negotiation, politics and art of speaking. Making people work harmoniously is much more difficult than producing a software.