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.
Sources and contributors:Chauncey Wilson, Shermin Ekhteraei, Nigel Bevan