Groupthink is one of the contributing factors that led to the Challerner disaster in 1986. Group Polarization, Brainstroming, Nominal Group Technique, Deil's Advocacy and Dialectical Inquiry are also techniques or situations that can affect group decision-making. Choose one of these factors and show the techniques used in a group decision-making situation and evaluate the strength of the decision-making that occurred and analyze the impact the factor or technique has on the result.