NGT is basically a refinement of Brainstorming which promotes individual actions in order to generate more ideas. Its advent was related with some results indicating that people use to censor themselves in groups to avoid criticism or evaluation, or that they may be dominated by extroverts \cite{sample1984nominal}. Some works also concluded that group participation when using Brainstorming inhibits creative thinking compared to using silent techniques \cite{taylor1958does}. Besides, NGT is preferred when stakeholders like a(/some) quantitative output of the process.