According to Edward Scannell there are mainly four categories of meetings:
Other: ...Staff meetings, planning meetings?
People meet for a variety of reasons. Generally, we meet in order to move group actions forward. We call this a task focus. To do this, participants do two things in meetings:
But people also meet for social reasons:
In planning a meeting, remember that for the task needs to be met, the social needs must be met and for the social needs to be met, the task needs must be met.
The group simulation focuses here on the last two categories of meetings, the brainstorming meeting and problem-solving meeting.
http://www.3m.com/meetingnetwork/readingroom/meetingguide_anatomy.html
Edward Scannell ("We’ve Got to Stop Meeting Like This," Training and Development, January 1992, pp. 70–71)