Thinking is done in parallel by the entire group. Thus every group member wears the WHITE hat at the same time. Every group member wears the RED hat at the same time, and so on.
"It is an alternative to traditional argument and is far more constructive." (p.283)
"The Six Hats Method gets rid of egos..." (p.284)
Source: Edward de Bono (1999) New Thinking For The New Millenium. Penguin Books.