Brainwriting (sometimes called "individual brainstorming") is a method for quickly generating ideas by asking participants to write their ideas on paper (or online) rather than announcing them in tradional group brainstorming sessions.
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Brainwriting has the advantage of parallel idea generation. In traditional group brainstorming, only one idea can be presented at a time (a serial process). In brainwriting, you can have the entire group writing ideas at the same time.

Brainwriting is also known as: a cascade session, idea writing, individual brainstorming<, and non-oral brainstorming.