Answer: brainstorming
Explanation:
This is a technique of sitting down as member of a particular group , share your ideas as you analyse ways to resolve a particular issue.
Usually all the ideas are drafted down from each individual person in order to be able to come up with a conclusion based on all the ideas that have been contributed .
This process makes it efficient to reach a solution since everyone contributes their ideas and the best resolution can be achieved from different input of ideas.