1. Brainstorming
The name "brainstorming" was originally used in the 1950's by Alex Osborn, the founder of an advertising firm. The aim of brainstorming is to produce the largest quantity of ideas concerning a problem in the shortest possible time. Osborn proposed 5 rules in brainstorming:
1. no evaluation of ideas
2. wild ideas to be encouraged
3. quantity of ideas is important
4. participants should build on each others'ideas
5. apart from the above four, there are on other rules