Focus Sessions
Focus sessions are not necessarily focus groups, though they could be this. They are merely contexts of exclusive involvement upon particular problems by one or more individuals, particularly contexts that have available enough heuristics and information to allow creative play of ideas and realistic analysis to be conducted.
Focus session involving more than one person have a tendency to run awry in conversation, or to drift in the point of focus. This may or may not be a good thing, but it is good on some level to moderate focus sessions for the sake of keeping the drift of dialog on target.
The value of such focus sessions seems to be that they enable the thorough exploration of alternative ideas about a problem set and can become quite creative moments if allowed to be and if personalities are kept out of them.