What is the structure of a working group like?

Someone in charge
- Or at least some control mechanism
Clearly defined roles
- Who's doing what?
- Who's responsible for what?
A clearly specified task
- Exactly what are we trying to achieve?
Divided into sub-tasks
- How can we make this task more manageable?
- How can we allocate tasks?
- Problem decomposition
A plan for integrating the sub-tasks
- How does this fit together?
- Which sub-tasks need to be coordinated?