To present basic information facts or points of view. To preset a relatively complete and systematic expression of ideas without interruption. To break down a relatively complex subject problem on the basic of:

1. Its logical component parts.
2. Different points of view or special interests.
3. Alternative proposed solutions and their consequences.

When there needs to be a relatively high degree of control over logical breakdown of the subject problem the subject matter discussed and the timing. To bring together and focus different points of view within a logical, more generalized framework or context.