What does it mean for a group to be focused? It's been my experience that focused groups work from questions rather than debates, opinions, assumptions, excuses, complaints, demands. They work from good questions and multiple questions.
Good questions inspire the group to new kinds of learning together, whether their learning is the result of research or experimenting.
When groups get stuck, lost or fragmented, they're working from inadequate questions in quality and/or quantity. Good questions accelerate people from perspiration to inspiration and from talk to action.