FGD (Focus Group Discussion) is a survey methodology which people with similar backgrounds or experiences gather in a single room to discuss a specific topic. The group is guided by a moderator who will explain about the topic and lead the discuss process.

The main area of Gang survey application is new product launch surveys. This method is of current interest as it provides more reliable information excluding fieldwork control problem due to the opportunity to watch the process the same way as focus group session; and more timely information as it mixes two usually following one another surveys and combines qualitative and quantitative methods.