Before starting to collaborate with anyone, it is also helpful to understand more about the way that people behave in groups and teams. Belbin noted that people tend to take on very specific roles such as group facilitator, task leader, and ideas generator. He gave each of these roles a name. He also noticed that the most functional groups tended to have at least one person taking on each role. Each person could take on more than one role, but if any of the roles was unrepresented, the group tended to be less likely to achieve its goals.