There are 2 kinds of meetings:

1. Briefings: meant to disseminate marching orders, find any last minute blockers/disagreements, and clarify any differences in interpretation of those marching orders. These should be infrequent, timed, and formal

2. Brainstorms: development meetings to identify, interpret, and develop action plans for problems, products, ideas, whatever. These should be frequent, open-ended, and informal