Advantages	Disadvantages
Participants meet face-to-face All participants have an opportunity to voice opinions Personal contact between experts Design of NGT does not allow any individual to dominate Group voting can occur if desired in later rounds	Certain members of the panel can take over discussion and drive results-experienced moderator required Limited by time— only a few questions can be discussed and agreed upon Economic and time costs associated with face-to-face meeting Limited to providing a solution to a few problems limits its applicability to multiple scenarios